portable operating table
standards for portable fire extinguishers
table for portable aspirator
128-bit operating systems
16-bit operating system
32-bit operating systems
64-Bit Operating Systems
alarm for operating condition
application for operating license
automatic operating system
batch-processing operating system
CCDOS ( Chinese character disc operating system )
client’s operating system
completely automatic operating system
computer operating interface
embedded Linux operating system
嵌入式Linux操作系统
Linux嵌入式操作系统
嵌入式Linux系统