UPS can refer to two different things:
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UPS as a company: UPS is a global shipping and logistics company that provides services for shipping packages across the world.
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UPS as a device: An uninterruptible power supply (UPS) is a type of continual power system that provides automated backup electric power to a device or equipment in the event of a power failure. A UPS is typically used to protect hardware such as computers, data centers, telecommunication equipment, or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, serious business disruption, or data loss. The most commonly used type of UPS is a full-time or full double conversion UPS, which provides near-instantaneous protection from input power interruptions by switching to energy stored in battery packs, supercapacitors, or flywheels. UPS units range in size from ones designed to protect a single computer without a video monitor to large units powering entire data centers or buildings.
