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The Smart-UPS is a series of enterprise-level uninterruptible power supplies (UPS) made by American Power Conversion (APC). [1] Most of the units have a SmartSlot (with the exception of SC and SMC series) which accepts an optional interface card providing features ranging from network connectivity to temperature and humidity monitoring. [2]
APC was founded in 1981 by three MIT Lincoln Lab electronic power engineers. Originally, the engineers focused on solar power research and development. [ 2 ] When government funding for their research ended, APC shifted its focus to power protection by introducing its first UPS in 1984.
The M21-1 Adjudication Procedures Manual does not constitute law, in contrast to statutes, federal regulations, and federal case law. The Department of Veterans Affairs has stated, “[t]he M21-1 is an internal manual used to convey guidance to VA adjudicators.