- single-user multi-tasking
- 户: one-panelled door; door
- 多任务: multitasking; multitask
- 操作系统: operating system; executive ...
- 单用户单任务操作系统: single-user single task
- 多任务操作系统: multiple task operating system; multipletaskoperatingsystem; multitasking operating system; multitasking operation system
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