Scratch "may have" and replace with "was"... Masscomp, or Massachusetts Computer Corporation, made multibus machines running RTU (Real Time UNIX). Not really sure why Perki-Data bought them (thats the common term for Perkin-Elmer Data Systems, since that was really Interdata after being bought by P-E).. Then they spun all the computer stuff off as Concurrent Computer Corp., who at some point accquired Harris's computer division also.. I have an Interdata and multiple P-E/Concurrents... Will J _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx