オペレーションシステムでした
operēshonshisutemudeshita
1. Was an operating system.
Noun
#238263
1. Was an operating system.
1. system
1. pupil; disciple
1. operation
1. operation
1. automatic lock
2. automatic door-locking system
1. becoming a pupil (of); becoming an apprentice
1. systems
1. geographic information system; GIS
1. deci-; 10^-1