1. Two bits synonym for quarter, crumb, tayste. 2. A four-pack of anything (compare hex). 3. The rectangle or box glyph used in the APL language for various arcane purpOSes mOStly related to I/O. Former Ivy-Leaguers and Oxford types are said to associate it with nOStalgic memories of dear old University (short for "quadrangle"). [Jargon File]