Digital Research Concurrent DOS/386 Operating System 
Version 2.0 for 3 Users Dated - 11/87  2 Disk set

Serial# 1118-0000-001714

cdos386a.IMZ - Disk 1 - Boot and Utilities
cdos386b.IMZ - Disk 2 - Utilities and Applications

This is a true multiuser/multitasking environment. 
Slaves are connected through serial ports. Server 
can have up to 4 DOS sessions running in a windowed 
environment.

> Box says, "up to 255 virtual 8086 programs can be 
run at once." 
> Compatible with MS-DOS 3.3 applications.
> Supports dBASE III Plus Lan
> Up to 4 gig of extended memory
> Password protection for files and directories by 
read, write and delete. Byte level record locking 
protection
> Maximum partition size is 512 megs

Hardware requirements: 

> IBM PS/2 Model 80, Compaq Deskpro 386 or 100% 
compatibles
> Minimum memory size if 512 kbytes. More is required 
for multiusers and multitasking. Typically 1 meg for 
every 3 users.
> Mono (MDA) or Color (CGA) with support for EGA.