bis = again; twice. Used as a direction to repeat a passage.
Used to request an additional performance.
Two; twice: bisalbuminemia.
Having two identical but separated complex chemical groups in one molecule: 1,4-bis(5-phenyloxazol-2-yl)-benzene.
bin = (BINary) A popular directory name in the Unix world for storing executable programs, device drivers and other binary files. See bin file and binares.
bin = a file that contains a copy of a disk drive, copied bit for bit from the original. Disk images are used to replicate the entire contents of a disk to one or more other disks. The copied disk is a 100% duplicate of the original, including all data, free space and slack space.
bi IN BRIEF: A prefix meaning "two.". A clam is a bivalve.