The B5500 doesn't run Algol 60, technically speaking. It runs Burroughs Extended Algol, which is based on Algol 60. For example, BEA (cuz I don't wanna type out the whole name), doesn't include all of the characters used in Algol 60, it has a different replacement operator, uses a different symbol for exponents, and powers of ten in numbers are written out differently. Another major difference is that Algol 60 doesn't have reserved words, and BEA does. There are some other details too.. If anyone is wondering, I'm getting this from my "ALGOL Programming ...A Basic Approach" which was written by 2 guys from Burroughs and one from Marathon Oil, who was big into the B5000. Will J _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com