操作作战特性
Operational characteristics
非同作操作系统
nonconcurrent operating system
NCOS
工作操作系统
WOS Working Operating System
实时同作操作
concurrency, operations(real-time
不归零操作
nonreturn-to-zero operation
抽象图归约机
abstract reduction machine
递归定义操作系统
recursively defined operating system