>>> a spreadsheet: Lotus 1-2-3. Used at a company I worked for immensely in the late 1990s on LAVC VAXes, with DECChart and DECCalc and DECWrite. I am still tempted to write a presentation in DECPresent, run it on my VAX (vm on a laptop, simh) and watch people's faces: OK they may want me locked up, but....