noun
terminate-and-stay-resident program; TSR program
Obsolete computing term for a program that remains in memory after termination, common in DOS-era environments.
MS-DOSの時代には、常駐終了型プログラムを使ってキーボードの機能を拡張することがよくあった。
In the MS-DOS era, terminate-and-stay-resident programs were often used to extend keyboard functionality.
常駐プログラム is a broader term for any resident program, while 常駐終了型プログラム specifically refers to the DOS TSR mechanism where the program terminates but stays in memory.
Compound of 常駐 (resident), 終了 (termination), 型 (type), and プログラム (program), calqued from English 'terminate-and-stay-resident program'.