リアルタイムOS おうえすじゃありませんでした
riarutaimu ōe suja arimasendeshita

Noun
Desu Copula

The polite, past negative form of リアルタイムOS

1. Was not a real-time OS.; Was not a real-time operating system.

Past/Perfective
Negative
Polite
Terminal Form
Computing