A term referring to the universal color and general design to all pre-yosemite G3 macintoshes, save a few (such as the AppleTV). This can be abbreviated by using B3 or B cubed. It was basically a statement comparing the creativity that was possible with computers with the uninspiring look of their cases.

Fortunately, Steve Jobs has done an excellent job in moving computing away from B3s with the revolutionary new designs of the G4, the G4 Cube, and the iMac. Because of this, in a few years this term may only be applied for its historical value.