You have to build a system of pipes closed at any end
out of a given set of elements. Editor included.
There is a (mostly) compatible PC-version !

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                10547   22056  47.8% -lh5- 80b0 Oct 24  1995 PipeLine/Editor
[generic]                  172    1238  13.9% -lh5- 4f00 Oct 24  1995 PipeLine/Editor.info
[generic]                10328   21232  48.6% -lh5- 6634 Oct 24  1995 PipeLine/PipeLine
[generic]                 3608    8719  41.4% -lh5- 1f47 Oct 24  1995 PipeLine/PipeLine.doc
[generic]                  219     463  47.3% -lh5- ce24 Oct 24  1995 PipeLine/PipeLine.doc.info
[generic]                  172    1238  13.9% -lh5- 6d53 Oct 24  1995 PipeLine/PipeLine.info
[generic]                  413     940  43.9% -lh5- 3755 Oct 24  1995 PipeLine/PipeLine.levels
[generic]                  171     675  25.3% -lh5- 9321 Oct 24  1995 PipeLine/PipeLine.levels.info
[generic]                98233  114061  86.1% -lh5- db1a Oct 24  1995 PipeLine/SAMPLES.RAW
[generic]                  262     628  41.7% -lh5- 1c1a Oct 24  1995 PipeLine.info
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        10 files  124125  171250  72.5%            Nov 21  1995