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Annotation of lucent/sys/man/1/units, revision 1.1

1.1     ! root        1: .TH UNITS 1
        !             2: .if n .ds / /
        !             3: .SH NAME
        !             4: units \- conversion program
        !             5: .SH SYNOPSIS
        !             6: .B units
        !             7: [
        !             8: .B -v
        !             9: ]
        !            10: [
        !            11: .I file
        !            12: ]
        !            13: .SH DESCRIPTION
        !            14: .I Units
        !            15: converts quantities expressed
        !            16: in various standard scales to
        !            17: their equivalents in other scales.
        !            18: It works interactively in this fashion:
        !            19: .IP
        !            20: .EX
        !            21: you have: inch
        !            22: you want: cm
        !            23:     * 2.54
        !            24:     / 0.393701
        !            25: .EE
        !            26: .PP
        !            27: A quantity is specified as a multiplicative combination
        !            28: of units and floating point numbers.
        !            29: Operators have the following precedence:
        !            30: .IP
        !            31: .EX
        !            32: .ta \w'\fLXXXXXXXXXXXXXXX'u
        !            33: \fL+\fP \fL-\fP        \f1add and subtract
        !            34: \fL*\fP \fL/\fP \fL×\fP \fL÷\fP      \f1multiply and divide
        !            35: catenation     multiply
        !            36: \fL²\fP \fL³\fP \fL^\fP      \f1exponentiation
        !            37: \fL|\fP        \f1divide
        !            38: \fL(\fP ... \fL)\fP    \f1grouping
        !            39: .EE
        !            40: .PP
        !            41: Most familiar units,
        !            42: abbreviations, and metric prefixes are recognized,
        !            43: together with a generous leavening of exotica
        !            44: and a few constants of nature including:
        !            45: .IP
        !            46: .de fq
        !            47: \fL\\$1\\fP    \\$2 \\$3 \\$4 \\$5 \\$6
        !            48: ..
        !            49: .ta \w'\fLwaterXXX'u
        !            50: .nf
        !            51: .fq pi,\f1π\fP ratio of circumference to diameter
        !            52: .fq c speed of light
        !            53: .fq e charge on an electron
        !            54: .fq g acceleration of gravity
        !            55: .fq force same as \fLg\fP
        !            56: .fq mole Avogadro's number
        !            57: .fq water "pressure head per unit height of water"
        !            58: .fq au astronomical unit
        !            59: .fi
        !            60: .PP
        !            61: The
        !            62: .L pound
        !            63: is a unit of
        !            64: mass.
        !            65: Compound names are run together, e.g.
        !            66: .LR lightyear .
        !            67: British units that differ from their US counterparts
        !            68: are prefixed thus:
        !            69: .LR brgallon .
        !            70: Currency is denoted
        !            71: .LR belgiumfranc ,
        !            72: .LR britainpound ,
        !            73: etc.
        !            74: .PP
        !            75: The complete list of units can be found in
        !            76: .BR /lib/units .
        !            77: A
        !            78: .I file
        !            79: argument to
        !            80: .I units
        !            81: specifies a file to be used instead of
        !            82: .BR /lib/units.
        !            83: The
        !            84: .B -v
        !            85: flag causes
        !            86: .I units
        !            87: to print its entire database.
        !            88: .SH EXAMPLE
        !            89: .EX
        !            90: you have: 15 pounds force/in²
        !            91: you want: atm
        !            92:     * 1.02069
        !            93:     / .97973
        !            94: .EE
        !            95: .SH FILES
        !            96: .B /lib/units
        !            97: .SH SOURCE
        !            98: .B /sys/src/cmd/units.y
        !            99: .SH BUGS
        !           100: Since
        !           101: .I units
        !           102: does only multiplicative scale changes,
        !           103: it can convert Kelvin to Rankine but not Centigrade to
        !           104: Fahrenheit.
        !           105: .br
        !           106: Currency conversions are only as accurate as the last time someone
        !           107: updated
        !           108: .BR /lib/units .

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