PKZIP and PKUNZIP are elsewhere in this collection.  See disk MAS88-1

PKZIP -h or PKUNZIP -h gives commands

ASK allows a query in a batch file and returns ERRORLEVEL 0 for Y or y

CED is a command line editor.

CORETEST is the CORE company disk test.

DD displays two directories side by side for comparison.

DSSC is a fast DISKCOPY program which reads the disk to be copied into memory

  and makes copies on A: and B: without having to reread the disk.

ERRCODE.LST are the error codes returned by the IBM diagnostics.  Somewhat

  out of date since they go back to Advanced Diagnostics 2.04.

LI is a LIST program which is very powerful and easy to use.

SEND allows you to send control characters to a device or screen.

STACKEY2 is a very versatile program which allows you to pass

  commands to a program or set up various options.  Restore with XARC.

VDEL is a wild card delete with query.

WAITUNTL will execute a program or batch file at requested time.

WHERE allows you to find any file on a hard disk.