1) Computers: back-ups, uninterruptable power supply
2) Military: uninterrupted power supply
3) Engineering: no-break power supply, uninterruptible power supply
4) Music: UPS
5) Telecommunications: uninterruptible-power system (ПК)
6) Information technology: uninterruptible power supply (http://ivb.unact.ru/glossary/upsupply.html)
7) Automation: uninterruptive power supply
8) oil&gas: uninterruptible power supply unit
9) Karachaganak: uninterruptible power supply (UPS) (аккумуляторная; ИБП)
10) Electrical engineering: "бесперебойник"
Универсальный русско-английский словарь. Академик.ру. 2011.