Microsoft

Operating Systems, Peripherals, Software

Models

MS-DOS (1981) — Microsoft MS-DOS (1981): the 8086 disk operating system that became the foundation for early IBM PCs and compatibles. Architecture, versions, and collectibility.
MS-DOS 3.3 — MS-DOS 3.3 carried the designation of 'Microsoft's very latest operating system' in a 1988 catalog listing, offered at a reduced price point of $109, $70.95 less than the…
MS-DOS 5.0 (1991) — Microsoft MS-DOS 5.0 (1991), the $85 memory-redefining DOS upgrade that answered DR DOS 5.0 and buried the 4.x fiasco.
MS-DOS 6.22 — Microsoft MS-DOS V6.22 was marketed not as a new architecture but as the latest refinement in a lineage that included versions 5.0 and 6.0.

Mouse (1983) — Microsoft Mouse (1983): two green buttons, steel ball, DB-25 serial, $195 launch price — the first Microsoft mouse, and a commercial flop that set the standard.

MultiPlan — MultiPlan arrived not as a revolution but as a migration. Microsoft’s first serious bid to move beyond BASIC interpreters and word processors into structured data, targeting…
QBasic — QBasic was a functional requirement in the DOS 5.0 ecosystem. Its absence would prevent the EDIT text editor from launching, as the utility depended on QBasic being present…