I have a Zenith luggable ZFA-161-52 with the popup fdds. I've dug into Dejanews archives but haven't found too much on it. I know the model # indicates a Z(enith) F( 48 TPI double sided) A( amber screen ) 161 model 5 (slots) 2 (fdds'). There's 2 Zenith newsgroups , one of which seems devoted to newer machines and the other Z-100 which is mainly porn spam. There's also a program archive on Oakland. There also seems to be some confusion as to what is a Z-100 machine which sometimes refers to only the 110 and 120 models and other times to anything with a 100 #. Apparently some of the models ran CP/M and had a S-100 bus and also ran ZDOS ,compatible with MSDOS. Mine has some 1983 and 1984 dates on it and boots from DOS as apparently all would. The built-in monitor system indicates 320k Ram. It has an 8088 CPU on one of the cards but I don't see another processor for CP/M. Any pointers to a source of info or info on this machine would be appreciated. ciao larry lwalker(a)interlog.com