LLC - Logical Link Control
Logical Link Control is one of two layers that forms the data link layer of the OSI model. The Logical Link Control sublayer handles error control, flow control, framing, and MAC-sublayer addressing. The other sublayer of the Data Link Layer is the medium access control (MAC) sublayer.
LLC - Limited Liability Company
Limited Liability Company is a business structure that provides limited liability to its owners in the vast majority of United States jurisdictions.
LLC - Laughing Like Crazy
"Laughing Like Crazy" is an internet slang used to express huge laugh in a really funny situation.