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1.
Bring Your Own Display, Keyboard and Mouse. Describes a computer that's just a CPU.
Apple's new Mac Mini
by The Grammar Nazi January 11, 2005
 
2.
Bring Your Own Display, Keyboard, and Monitor

Coined after Apple CEO Steve Job's 2005 Macworld San Franciso Keynote speech, when he was introducing the Mac mini.
"Now the Mac mini is BYODKM" - Steve Jobs
by MacFanatic05 January 11, 2005