Definition of UMPC noun from the Oxford Advanced American Dictionary

 

UMPC

 noun
noun
NAmE//ˌyu ɛm pi ˈsi//
 
(computing)
 
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a very small computer that is easy to carry, often with a touch screen and sometimes without a physical keyboard (the abbreviation for“ultra-mobile personal computer”)
See the Oxford Advanced Learner's Dictionary entry: UMPC