オペレーションシステムだった
operēshonshisutemudatta
1. Was an operating system.
Noun
#2089620
1. Was an operating system.
1. If it were an operating system.; When it is an operating system.
1. system
1. operation
1. operation
1. systems
1. automatic lock
2. automatic door-locking system
1. geographic information system; GIS
1. filing system
1. System's; Of the system