Digital Research Concurrent CPM-86 2.5 
Released in 1983 by Digital Research Inc./Digital Equipment Corporation
For the DEC Rainbow computer

Includes the following disks:
ccpmgsx - GSX Graphics Library Support Disk
ccpmsys - Concurrent CPM-86 2.5 Boot Disk
ccpmutil - Concurrent CPM-86 2.5 Utilities Disk

Important: This disk will not work on an IBM PC or compatible. The
DEC Rainbow used a very non-standard 400K single sided, 80 tack,
5.25" format.

Use IMGDISK 1.18 to write it to a floppy disk. To write these you 
must use a double density (360k) disk in a high density 1.2mb drive.

This archive also includes Teledisk images. 