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Annotation of 43BSDReno/share/doc/ps2/02.summary/vhel1, revision 1.1

1.1     ! root        1: .\"    @(#)vhel1       6.1 (Berkeley) 4/25/86
        !             2: .\"
        !             3: .\"    @(#)vhel1       6.1 (Berkeley) 4/25/86
        !             4: .\"
        !             5: .SH
        !             6: B.  Hardware
        !             7: .PP
        !             8: The
        !             9: .UC "UNIX/32V"
        !            10: operating system
        !            11: runs on
        !            12: a DEC VAX-11/780*
        !            13: .FS
        !            14: *VAX is a Trademark of Digital Equipment Corporation.
        !            15: .FE
        !            16: with at least the following equipment:
        !            17: .IP
        !            18: memory: 256K bytes or more.
        !            19: .IP
        !            20: disk: RP06, RM03, or equivalent.
        !            21: .IP
        !            22: tape: any 9-track MASSBUS-compatible tape drive.
        !            23: .LP
        !            24: The following equipment is strongly recommended:
        !            25: .IP
        !            26: communications controller such as DZ11 or DL11.
        !            27: .IP
        !            28: full duplex 96-character ASCII terminals.
        !            29: .IP
        !            30: extra disk for system backup.
        !            31: .LP
        !            32: The system is normally distributed on 9-track tape.
        !            33: The minimum memory and disk space specified is enough to run
        !            34: and maintain
        !            35: .UC "UNIX/32V,"
        !            36: and to keep all source on line.
        !            37: More memory will be needed
        !            38: to handle
        !            39: a large number of users,
        !            40: big data bases, diversified complements of devices, or large
        !            41: programs.
        !            42: The resident code
        !            43: occupies 40-55K bytes depending
        !            44: on configuration;
        !            45: system data also occupies 30-55K bytes.
        !            46: .SH
        !            47: C.  Software
        !            48: .PP
        !            49: Most of the programs available as
        !            50: .UC "UNIX/32V"
        !            51: commands are listed.
        !            52: Source code and printed manuals are 
        !            53: distributed for all of the listed software
        !            54: except games.
        !            55: Almost all of the code is written in C.
        !            56: Commands are self-contained and do not require extra setup
        !            57: information,
        !            58: unless specifically noted as ``interactive.''
        !            59: Interactive programs can be made to run from a prepared script
        !            60: simply by redirecting input.
        !            61: Most programs intended for interactive use
        !            62: (e.g., the editor) 
        !            63: allow for an escape to
        !            64: command level (the Shell).
        !            65: Most file processing commands
        !            66: can also go from standard input to standard output
        !            67: (``filters'').
        !            68: The piping facility of the Shell may be used
        !            69: to connect such filters directly to the input or output
        !            70: of other programs.
        !            71: .NH
        !            72: Basic Software
        !            73: .PP
        !            74: This
        !            75: includes the time-sharing operating
        !            76: system with utilities, and a 
        !            77: compiler for the programming language C\(emenough
        !            78: software to
        !            79: write and run new applications
        !            80: and to maintain or modify
        !            81: .UC "UNIX/32V"
        !            82: itself.
        !            83: .NH 2
        !            84: Operating System
        !            85: .sh UNIX
        !            86: The basic resident code
        !            87: on which everything else depends.
        !            88: Supports the system calls, and maintains the file system.
        !            89: A general description of
        !            90: .UC UNIX
        !            91: design
        !            92: philosophy and system facilities appeared in
        !            93: the Communications of the ACM, July, 1974.
        !            94: A more extensive survey is in the Bell System Technical Journal
        !            95: for July-August 1978.
        !            96: Capabilities include:
        !            97: .op
        !            98: Reentrant code for user processes.
        !            99: .op
        !           100: ``Group'' access permissions for cooperative projects,
        !           101: with overlapping memberships.
        !           102: .op
        !           103: Alarm-clock timeouts.
        !           104: .op
        !           105: Timer-interrupt sampling and interprocess monitoring
        !           106: for debugging and measurement.
        !           107: .OP
        !           108: Multiplexed I/O for machine-to-machine communication.
        !           109: .sh DEVICES
        !           110: All I/O is logically synchronous.
        !           111: I/O devices are simply files in the file system.
        !           112: Normally, invisible buffering makes all physical
        !           113: record structure and device characteristics transparent and exploits the
        !           114: hardware's ability to do overlapped I/O.
        !           115: Unbuffered physical record
        !           116: I/O is available for unusual applications.
        !           117: Drivers for these devices are
        !           118: available:
        !           119: .op
        !           120: Asynchronous interfaces: DZ11, DL11.
        !           121: Support for most common ASCII terminals.
        !           122: .op
        !           123: Automatic calling unit interface: DN11.
        !           124: .op
        !           125: Printer/plotter: Versatek.
        !           126: .op
        !           127: Magnetic tape: TE16.
        !           128: .op
        !           129: Pack type disk: RP06, RM03;
        !           130: minimum-latency seek scheduling.
        !           131: .op
        !           132: Physical memory of VAX-11, or mapped memory in resident system.
        !           133: .op
        !           134: Null device.
        !           135: .op
        !           136: Recipies are supplied to aid the construction of drivers for:
        !           137: .nf
        !           138: .in +2
        !           139: Asynchronous interface: DH11.
        !           140: Synchronous interface: DU11.
        !           141: DECtape: TC11.
        !           142: Fixed head disk: RS11, RS03 and RS04.
        !           143: Cartridge-type disk: RK05.
        !           144: Phototypesetter: Graphic Systems System/1 through DR11C.
        !           145: .in -2
        !           146: .fi
        !           147: .sh BOOT
        !           148: Procedures to get
        !           149: .UC "UNIX/32V"
        !           150: started.
        !           151: .NH 2
        !           152: User Access Control
        !           153: .LP
        !           154: .sh LOGIN
        !           155: Sign on as a new user.
        !           156: .op
        !           157: Verify password and establish user's 
        !           158: individual and group (project) identity.
        !           159: .op
        !           160: Adapt to characteristics of terminal.
        !           161: .op
        !           162: Establish working directory.
        !           163: .op
        !           164: Announce presence of mail (from MAIL).
        !           165: .op
        !           166: Publish message of the day.
        !           167: .op
        !           168: Execute user-specified profile.
        !           169: .op
        !           170: Start command interpreter or other initial program.
        !           171: .sh PASSWD
        !           172: Change a password.
        !           173: .op
        !           174: User can change his own password.
        !           175: .op
        !           176: Passwords are kept encrypted for security.
        !           177: .sh NEWGRP
        !           178: Change working group (project).
        !           179: Protects against unauthorized changes to projects.
        !           180: .NH 2
        !           181: Terminal Handling
        !           182: .LP
        !           183: .sh TABS
        !           184: Set tab stops appropriately for specified terminal type.
        !           185: .sh STTY
        !           186: Set up options for optimal control of a terminal.
        !           187: In so far as they are deducible from the input, these
        !           188: options are set automatically by LOGIN.
        !           189: .op
        !           190: Half vs. full duplex.
        !           191: .op
        !           192: Carriage return+line feed vs. newline.
        !           193: .op
        !           194: Interpretation of tabs.
        !           195: .op
        !           196: Parity.
        !           197: .op
        !           198: Mapping of upper case to lower.
        !           199: .op
        !           200: Raw vs. edited input.
        !           201: .op
        !           202: Delays for tabs, newlines and carriage returns.
        !           203: .NH 2
        !           204: File Manipulation
        !           205: .LP
        !           206: .sh CAT
        !           207: Concatenate one or more files onto standard output.
        !           208: Particularly used for unadorned printing, for
        !           209: inserting data into a pipeline,
        !           210: and for buffering output that comes in dribs and drabs.
        !           211: Works on any file regardless of contents.
        !           212: .sh CP
        !           213: Copy one file to another,
        !           214: or a set of files to a directory.
        !           215: Works on any file regardless of contents.
        !           216: .sh PR
        !           217: Print files with title, date, and page number on every page.
        !           218: .op
        !           219: Multicolumn output.
        !           220: .op
        !           221: Parallel column merge of several files.
        !           222: .sh LPR
        !           223: Off-line print.
        !           224: Spools arbitrary files to the line printer.
        !           225: .sh CMP
        !           226: Compare two files and report if different.
        !           227: .sh TAIL
        !           228: Print last
        !           229: .I n
        !           230: lines of input
        !           231: .op
        !           232: May print last
        !           233: .I n
        !           234: characters, or from
        !           235: .I n
        !           236: lines or characters to end.
        !           237: .sh SPLIT
        !           238: Split a large file into more manageable pieces.
        !           239: Occasionally necessary for editing (ED).
        !           240: .sh DD
        !           241: Physical file format translator,
        !           242: for exchanging data with foreign
        !           243: systems, especially IBM 370's.
        !           244: .sh SUM
        !           245: Sum the words of a file.
        !           246: .NH 2
        !           247: Manipulation of Directories and File Names
        !           248: .LP
        !           249: .sh RM
        !           250: Remove a file.
        !           251: Only the name goes away if any other names are linked to the file.
        !           252: .OP
        !           253: Step through a directory deleting files interactively.
        !           254: .OP
        !           255: Delete entire directory hierarchies.
        !           256: .sh LN
        !           257: ``Link'' another name (alias) to an existing file.
        !           258: .sh MV
        !           259: Move a file or files.
        !           260: Used for renaming files.
        !           261: .sh CHMOD
        !           262: Change permissions on one or more files.
        !           263: Executable by files' owner.
        !           264: .sh CHOWN
        !           265: Change owner of one or more files.
        !           266: .sh CHGRP
        !           267: Change group (project) to which a file belongs.
        !           268: .sh MKDIR
        !           269: Make a new directory.
        !           270: .sh RMDIR
        !           271: Remove a directory.
        !           272: .sh CD
        !           273: Change working directory.
        !           274: .sh FIND
        !           275: Prowl the directory
        !           276: hierarchy finding
        !           277: every file that meets
        !           278: specified criteria.
        !           279: .op
        !           280: Criteria include:
        !           281: .in +2
        !           282: .nf
        !           283: name matches a given pattern,
        !           284: creation date in given range,
        !           285: date of last use in given range,
        !           286: given permissions,
        !           287: given owner,
        !           288: given special file characteristics,
        !           289: boolean combinations of above.
        !           290: .in -2
        !           291: .fi
        !           292: .op
        !           293: Any directory may be considered to be the root.
        !           294: .op
        !           295: Perform specified command on each file found.
        !           296: .NH 2
        !           297: Running of Programs
        !           298: .LP
        !           299: .sh SH
        !           300: The Shell, or command language interpreter.
        !           301: .op
        !           302: Supply arguments to and run any executable program.
        !           303: .op
        !           304: Redirect standard input, standard output, and standard error files.
        !           305: .op
        !           306: Pipes:
        !           307: simultaneous execution with output of one process connected
        !           308: to the input of another.
        !           309: .OP
        !           310: Compose compound commands using:
        !           311: .in+2
        !           312: if ... then ... else,
        !           313: .br
        !           314: case switches,
        !           315: .br
        !           316: while loops,
        !           317: .br
        !           318: for loops over lists,
        !           319: .br
        !           320: break, continue and exit,
        !           321: .br
        !           322: parentheses for grouping.
        !           323: .in -2
        !           324: .op
        !           325: Initiate background processes.
        !           326: .op
        !           327: Perform Shell programs, i.e., command scripts with
        !           328: substitutable arguments.
        !           329: .op
        !           330: Construct argument lists from all file names
        !           331: satisfying specified patterns.
        !           332: .OP
        !           333: Take special action on traps and interrupts.
        !           334: .OP
        !           335: User-settable search path for finding commands.
        !           336: .OP
        !           337: Executes user-settable profile upon login.
        !           338: .OP
        !           339: Optionally announces presence of mail as it arrives.
        !           340: .op
        !           341: Provides variables and parameters with default setting.
        !           342: .sh TEST
        !           343: Tests for use in Shell conditionals.
        !           344: .op
        !           345: String comparison.
        !           346: .op
        !           347: File nature and accessibility.
        !           348: .op
        !           349: Boolean combinations of the above.
        !           350: .sh EXPR
        !           351: String computations for calculating command arguments.
        !           352: .OP
        !           353: Integer arithmetic
        !           354: .OP
        !           355: Pattern matching
        !           356: .sh WAIT
        !           357: Wait for termination of asynchronously running processes.
        !           358: .sh READ
        !           359: Read a line from terminal,
        !           360: for interactive Shell procedure.
        !           361: .sh ECHO
        !           362: Print remainder of command line.
        !           363: Useful for diagnostics or prompts in Shell programs,
        !           364: or for inserting data into a pipeline.
        !           365: .sh SLEEP
        !           366: Suspend execution for a specified time.
        !           367: .sh NOHUP
        !           368: Run a command immune to hanging up the terminal.
        !           369: .sh NICE
        !           370: Run a command in low (or high) priority.
        !           371: .sh KILL
        !           372: Terminate named processes.
        !           373: .sh CRON
        !           374: Schedule regular actions at specified times.
        !           375: .op
        !           376: Actions are arbitrary programs.
        !           377: .op
        !           378: Times are
        !           379: conjunctions of month, day of month, day of week, hour
        !           380: and minute.
        !           381: Ranges are specifiable for each.
        !           382: .sh AT
        !           383: Schedule a one-shot action for an arbitrary time.
        !           384: .sh TEE
        !           385: Pass data between processes and divert a copy into one or more files.
        !           386: .NH 2
        !           387: Status Inquiries
        !           388: .LP
        !           389: .sh LS
        !           390: List the names of one, several, or all files in one or more directories.
        !           391: .op
        !           392: Alphabetic or temporal sorting, up or down.
        !           393: .op
        !           394: Optional information:
        !           395: size,
        !           396: owner,
        !           397: group,
        !           398: date last modified,
        !           399: date last accessed,
        !           400: permissions,
        !           401: i-node number.
        !           402: .sh FILE
        !           403: Try to determine 
        !           404: what kind of information is in a file by consulting
        !           405: the file system index and by reading the file itself.
        !           406: .sh DATE
        !           407: Print today's date and time.
        !           408: Has considerable knowledge
        !           409: of calendric and horological peculiarities.
        !           410: .op
        !           411: May set
        !           412: .UC "UNIX/32V" 's
        !           413: idea of date and time.
        !           414: .sh DF
        !           415: Report amount of free space on file system devices.
        !           416: .sh DU
        !           417: Print a summary of total space occupied by all files in a hierarchy.
        !           418: .sh QUOT
        !           419: Print summary of file space usage by user id.
        !           420: .sh WHO
        !           421: Tell who's on the system.
        !           422: .op
        !           423: List of presently logged in users,
        !           424: ports and times on.
        !           425: .op
        !           426: Optional history of all logins and logouts.
        !           427: .sh PS
        !           428: Report on active processes.
        !           429: .op
        !           430: List your own or everybody's processes.
        !           431: .op
        !           432: Tell what commands are being executed.
        !           433: .op
        !           434: Optional status information:
        !           435: state and scheduling info,
        !           436: priority,
        !           437: attached terminal,
        !           438: what it's waiting for,
        !           439: size.
        !           440: .sh IOSTAT
        !           441: Print statistics about system I/O activity.
        !           442: .sh TTY
        !           443: Print name of your terminal.
        !           444: .sh PWD
        !           445: Print name of your working directory.
        !           446: .NH 2
        !           447: Backup and Maintenance
        !           448: .LP
        !           449: .sh MOUNT
        !           450: Attach a device containing
        !           451: a file system to
        !           452: the tree of directories.
        !           453: Protects against nonsense arrangements.
        !           454: .sh UMOUNT
        !           455: Remove the file system contained on a device
        !           456: from the tree of directories.
        !           457: Protects against removing a busy device.
        !           458: .sh MKFS
        !           459: Make a new file system on a device.
        !           460: .sh MKNOD
        !           461: Make an i-node (file system entry) for a special file.
        !           462: Special files are
        !           463: physical devices,
        !           464: virtual devices, physical memory, etc.
        !           465: .sh TP
        !           466: .sh TAR
        !           467: Manage file archives on magnetic tape or DECtape.
        !           468: TAR is newer.
        !           469: .op
        !           470: Collect files into an archive.
        !           471: .op
        !           472: Update DECtape archive by date.
        !           473: .op
        !           474: Replace or delete DECtape files.
        !           475: .op
        !           476: Print table of contents.
        !           477: .op
        !           478: Retrieve from archive.
        !           479: .sh DUMP
        !           480: Dump the file system
        !           481: stored on a specified device, selectively by date, or indiscriminately.
        !           482: .sh RESTOR
        !           483: Restore a dumped file system,
        !           484: or selectively retrieve parts thereof.
        !           485: .sh SU
        !           486: Temporarily become the super user with all the rights and privileges
        !           487: thereof.
        !           488: Requires a password.
        !           489: .sh DCHECK
        !           490: .sh ICHECK
        !           491: .sh NCHECK
        !           492: Check consistency of file system.
        !           493: .op
        !           494: Print gross statistics:
        !           495: number of files,
        !           496: number of directories,
        !           497: number of special files,
        !           498: space used,
        !           499: space free.
        !           500: .op
        !           501: Report duplicate use of space.
        !           502: .op
        !           503: Retrieve lost space.
        !           504: .op
        !           505: Report inaccessible files.
        !           506: .op
        !           507: Check consistency of directories.
        !           508: .op
        !           509: List names of all files.
        !           510: .sh CLRI
        !           511: Peremptorily expunge a file and its space from a file system.
        !           512: Used to repair damaged file systems.
        !           513: .sh SYNC
        !           514: Force all outstanding I/O on the system to completion.
        !           515: Used to shut down gracefully.
        !           516: .NH 2
        !           517: Accounting
        !           518: .LP
        !           519: The timing information on which the reports are based can be
        !           520: manually cleared or shut off completely.
        !           521: .sh AC
        !           522: Publish cumulative connect time report.
        !           523: .op
        !           524: Connect time by user or by day.
        !           525: .op
        !           526: For all users or for selected users.
        !           527: .sh SA
        !           528: Publish Shell accounting
        !           529: report.
        !           530: Gives usage information on each command executed.
        !           531: .op
        !           532: Number of times used.
        !           533: .op
        !           534: Total system time, user time and elapsed time.
        !           535: .op
        !           536: Optional averages and percentages.
        !           537: .op
        !           538: Sorting on various fields.
        !           539: .NH 2
        !           540: Communication
        !           541: .LP
        !           542: .sh MAIL
        !           543: Mail a message to one or more users.
        !           544: Also used to read and dispose of incoming mail.
        !           545: The presence of mail is announced by LOGIN
        !           546: and optionally by SH.
        !           547: .op
        !           548: Each message can be disposed of individually.
        !           549: .op
        !           550: Messages can be saved in files or forwarded.
        !           551: .sh CALENDAR
        !           552: Automatic reminder service for events of today and tomorrow.
        !           553: .sh WRITE
        !           554: Establish direct terminal communication with another user.
        !           555: .sh WALL
        !           556: Write to all users.
        !           557: .sh MESG
        !           558: Inhibit receipt of messages from WRITE and WALL.
        !           559: .sh CU
        !           560: Call up another time-sharing system.
        !           561: .OP
        !           562: Transparent interface to remote machine.
        !           563: .OP
        !           564: File transmission.
        !           565: .OP
        !           566: Take remote input from local file or put remote output
        !           567: into local file.
        !           568: .OP
        !           569: Remote system need not be
        !           570: .UC "UNIX/32V" .
        !           571: .sh UUCP
        !           572: .UC UNIX
        !           573: to
        !           574: .UC UNIX
        !           575: copy.
        !           576: .OP
        !           577: Automatic queuing until line becomes available
        !           578: and remote machine is up.
        !           579: .OP
        !           580: Copy between two remote machines.
        !           581: .op
        !           582: Differences, mail, etc., between two machines.
        !           583: .NH 2
        !           584: Basic Program Development Tools
        !           585: .LP
        !           586: Some of these utilities are used as integral parts of
        !           587: the higher level languages described in section 2.
        !           588: .sh AR
        !           589: Maintain archives and libraries.
        !           590: Combines several files into one for housekeeping efficiency.
        !           591: .op
        !           592: Create new archive.
        !           593: .op
        !           594: Update archive by date.
        !           595: .op
        !           596: Replace or delete files.
        !           597: .op
        !           598: Print table of contents.
        !           599: .op
        !           600: Retrieve from archive.
        !           601: .sh AS
        !           602: Assembler.
        !           603: .op
        !           604: Creates object program consisting of
        !           605: .in+2
        !           606: .nf
        !           607: code, normally read-only and sharable,
        !           608: initialized data or read-write code,
        !           609: uninitialized data.
        !           610: .in -2
        !           611: .fi
        !           612: .op
        !           613: Relocatable object code is directly executable without
        !           614: further transformation.
        !           615: .op
        !           616: Object code normally includes a symbol table.
        !           617: .op
        !           618: ``Conditional jump'' instructions become
        !           619: branches or branches plus jumps depending on distance.
        !           620: .sh Library
        !           621: The basic run-time library.
        !           622: These routines are used freely by all software.
        !           623: .op
        !           624: Buffered character-by-character I/O.
        !           625: .op
        !           626: Formatted input and output conversion (SCANF and PRINTF)
        !           627: for standard input and output, files, in-memory conversion.
        !           628: .op
        !           629: Storage allocator.
        !           630: .op
        !           631: Time conversions.
        !           632: .op
        !           633: Number conversions.
        !           634: .op
        !           635: Password encryption.
        !           636: .op
        !           637: Quicksort.
        !           638: .op
        !           639: Random number generator.
        !           640: .op
        !           641: Mathematical function library, including
        !           642: trigonometric functions and inverses,
        !           643: exponential, logarithm, square root,
        !           644: bessel functions.
        !           645: .sh ADB
        !           646: Interactive debugger.
        !           647: .op
        !           648: Postmortem dumping.
        !           649: .OP
        !           650: Examination of arbitrary files, with no limit on size.
        !           651: .op
        !           652: Interactive breakpoint debugging with the debugger as a separate
        !           653: process.
        !           654: .OP
        !           655: Symbolic reference to local and global variables.
        !           656: .op
        !           657: Stack trace for C programs.
        !           658: .OP
        !           659: Output formats:
        !           660: .in+2
        !           661: .nf
        !           662: 1-, 2-, or 4-byte integers in octal, decimal, or hex
        !           663: .br
        !           664: single and double floating point
        !           665: .br
        !           666: character and string
        !           667: .br
        !           668: disassembled machine instructions
        !           669: .br
        !           670: .fi
        !           671: .in-2
        !           672: .op
        !           673: Patching.
        !           674: .OP
        !           675: Searching for integer, character, or floating patterns.
        !           676: .sh OD
        !           677: Dump any file.
        !           678: Output options include any combination of
        !           679: octal or decimal or hex by words,
        !           680: octal by bytes,
        !           681: ASCII,
        !           682: opcodes,
        !           683: hexadecimal.
        !           684: .op
        !           685: Range of dumping is controllable.
        !           686: .sh LD
        !           687: Link edit.
        !           688: Combine relocatable object files.
        !           689: Insert required routines from specified libraries.
        !           690: .op
        !           691: Resulting code is sharable by default.
        !           692: .sh LORDER
        !           693: Places object file names in proper order for loading,
        !           694: so that files depending on others come after them.
        !           695: .sh NM
        !           696: Print the namelist (symbol table) of an object program.
        !           697: Provides control over the style and order of
        !           698: names that are printed.
        !           699: .sh SIZE
        !           700: Report the memory requirements
        !           701: of one or more object files.
        !           702: .sh STRIP
        !           703: Remove the relocation and symbol table information from
        !           704: an object file to save space.
        !           705: .sh TIME
        !           706: Run a command and report timing information on it.
        !           707: .sh PROF
        !           708: Construct a profile of time spent per routine
        !           709: from statistics gathered by time-sampling the
        !           710: execution of a program.
        !           711: .op
        !           712: Subroutine call frequency and average times for C programs.
        !           713: .sh MAKE
        !           714: Controls creation of large programs.
        !           715: Uses a control file specifying source file dependencies
        !           716: to make new version;
        !           717: uses time last changed to deduce minimum amount of work necessary.
        !           718: .op
        !           719: Knows about CC, YACC, LEX, etc.
        !           720: .NH 2
        !           721: UNIX/32V Programmer's Manual
        !           722: .LP
        !           723: .sh Manual
        !           724: Machine-readable version of the
        !           725: .UC "UNIX/32V"
        !           726: Programmer's Manual.
        !           727: .op
        !           728: System overview.
        !           729: .op
        !           730: All commands.
        !           731: .op
        !           732: All system calls.
        !           733: .op
        !           734: All subroutines in C and assembler libraries.
        !           735: .op
        !           736: All devices and other special files.
        !           737: .op
        !           738: Formats of file system and kinds
        !           739: of files known to system software.
        !           740: .op
        !           741: Boot and maintenance procedures.
        !           742: .sh MAN
        !           743: Print specified manual section on your terminal.
        !           744: .NH 2
        !           745: Computer-Aided Instruction
        !           746: .LP
        !           747: .sh LEARN
        !           748: A program for interpreting CAI scripts, plus scripts
        !           749: for learning about 
        !           750: .UC "UNIX/32V"
        !           751: by using it.
        !           752: .op
        !           753: Scripts for basic files and commands,
        !           754: editor,
        !           755: advanced files and commands,
        !           756: .UC EQN ,
        !           757: .UC MS
        !           758: macros,
        !           759: C programming language.

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