Vintage Borland Sidekick Plus The Professional Desktop Manager software for IBM PC/XT/AT, PS/2 and compatibles. This classic DOS-based productivity suite includes Notepads, Outliners, Phonebook, Time Planner, File Manager, Calculators, and more. This original big box release comes factory sealed and includes both 5.25" and 3.5" diskettes as well as the Owner's Handbook. A must-have for vintage computing collectors and enthusiasts of 1980s software history. System requirements include DOS 2.0 or later and 384K RAM.