quad
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}]