In a message dated 2/3/2001 11:27:08 AM Pacific Standard Time, vcf(a)siconic.com writes: I have had a couple of these go through my hands about 10 years ago. I think they are late 70s or early 80s. IIRC they are a 16 bit systems with up to 128K or 512K of RAM. The C indicates Commercial and the S indicates Scientific so I think this is a multipurpose computer. I think they were a shrunk version of the Eclipse S/200 and the C/300 which were introduced in 1975. By shrunk I mean the circuit cards are about 8"X12" instead of the original Eclipse cards which are about 16" square. I think MOS memory only. About 1990 I sold one of the 512K cards for good money. The original full size Eclipses came with either core or MOS memory. I looked it up in my in my "Computer Review" of 1977 and they are not mentioned so I think they were manufactured after that. Paxton Portland, OR