Annotation of researchv10dc/vol2/ipc/fig3, revision 1.1.1.1

1.1       root        1: .KF
                      2: .PS
                      3: boxht = boxht/1.5
                      4: arrow "user" "write"
                      5: move up boxht/2
                      6: line right boxwid/2 then down boxht then left boxwid/2
                      7: move by (boxwid/2, boxht/2)
                      8: spline -> right linewid then down boxht right linewid then right linewid
                      9: move up boxht
                     10: line up boxht/2
                     11: line right boxwid/2 
                     12: move down boxht
                     13: line left boxwid/2 then up boxht/2
                     14: move right boxwid/2
                     15: arrow <- "user" "write"
                     16: move down boxht left linewid
                     17: arrow -> right "user" "read"
                     18: move down boxht/2 left linewid
                     19: line left boxwid/2 then up boxht
                     20: move up boxht/2
                     21: spline -> left linewid then down boxht left linewid then left linewid
                     22: move up boxht/2
                     23: line down boxht then left boxwid/2
                     24: move up boxht/2
                     25: arrow left "user" "read"
                     26: .PE
                     27: .sp .5
                     28: .ce
                     29: Figure 3.  A pipe.
                     30: .sp
                     31: .KE

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