Richard Erlacher wrote:: << Golly! That does bring back the memories . . . but wasn't the CDC6xxx family 64 bits? I cut my teeth on that one, back in the mid 1960's and it seems that it (the 6600) was a dual-processor version of the 64-bit 6400. The CDC 6400, 6600, 7600 all were 60 bit, definitely. The Cray-1 is the first 64-bit machine in the Seymour Cray line. Those were the days . . . FORTRAN-II, SCOPE OS, COMPASS assembler . . . batch processing . . . (that meant you wrote your code on a 24-line 80-column "coding sheet" and, when finished, gave them to a woman behind a door with a small window in it . . . and got your error listing a few days later) . . . I'd have given a week's pay for an hour in that room behind the door . . . mini-skirts . . . (you do remember keypunch operators and Hollerith cards, don't you?) Dick >> It does bring back memories ! John G. Zabolitzky