Meaning

noun a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes

noun a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes

originEtymology tree Proto-Indo-European *méǵh₂s Proto-Hellenic *mégas Ancient Greek μέγᾰς (mégăs)der. English mega- Proto-Indo-European *bʰeyd- Proto-Indo-European *bʰéydt Proto-Germanic *bītaną Proto-West Germanic *bītan Old English bītan Middle English biten English bite English byte English megabyte From mega- + byte.

Etymology from Wiktionary, CC BY-SA 3.0