オペレーティングシステムでした
operētingushisutemudeshita
1. Was an operating system.
Noun
#1338372
1. Was an operating system.
1. system
1. pupil; disciple
1. deci-; 10^-1
1. becoming a pupil (of); becoming an apprentice
1. systems
1. automatic lock
2. automatic door-locking system
1. geographic information system; GIS
1. filing system
1. System's; Of the system