File Comment Abacus for Windows v1.00E (FREE SOFT) Calculators getting too complex for you? Or just getting tired of using them? Then try this! Don't have to know all those complex instructions which you probably will never use. Don't have to read all those manuals written in who knows what language. No more rounding off errors! This program is what you've been waiting for! Req: Windows 3.1. Last revision date in archive: 02-16-95.