MemMaker was Microsoft’s built‑in tool for squeezing every last drop of performance out of your old DOS PCs in the early ’90s. Dropping with MS‑DOS 6.0 in 1993, it basically automated the headache of moving drivers and TSRs (terminate‑and‑stay‑resident programs) between conventional, upper, and high memory to free up those precious 640KB so your games and apps would actually run. Before MemMaker, you were hand‑editing CONFIG.SYS and AUTOEXEC.BAT like a mad scientist; MemMaker made it push‑button simple. It stuck around through MS‑DOS 6.22 in 1994, but once Windows 95 took over with its beefier memory management, MemMaker became a relic—one of those tools that reminds you just how much we used to fight our machines to play Doom or run WordPerfect.