I have heard tell (from a very reliable source) of a version of Unix <written for the Radio Shack Model 100 (8085, 32K max). (And no, it's no <available, and yes, he's tried to get the company that did it to release Call me skeptical, 8085 is far less code efficient that z80. <I thought someone had said that CP/M was based on Unix? Or was that on <of the PDP opsys? CP/M was based on OS/8 and RT-11, it is very un-unix. DEC Ultrix-11 and Ultrix-32 are both unix based on BSD versions. Allison