What does SUM stand for?

What does SUM mean?

SUM	Summary Computing » File Extensions
SUM	Summary Governmental » NASA
SUM	Software User Manual Governmental » Military
SUM	Software User's Manual Computing » Software
SUM	Systems Unit Method Business » General
SUM	Single User Monitor Computing » General
SUM	SOHO User's Manual Governmental » NASA
SUM	Self Updating Memory Miscellaneous » Funnies
SUM	Straight Up Margin Community » Media
SUM	Support Upskilling And Multicultural Computing » Software
SUM	Selective Understanding Markets Business » General
SUM	Students Undertaking Missions Community » Religion
SUM	Solium Capital Inc. Business » Toronto Stock Exchange
SUM	Sumatra Copper & Gold Plc Business » ASX Symbols

sum(n.): the aggregate of two or more numbers, magnitudes, quantities, or particulars as determined by or as if by the mathematical process of addition: