(SNA) IBM' s proprietary high level networking protocolstandard, used by IBM and IBM compatible mainframes. Also referred to as "BLUe GLUe", SNA is a bletcherous protocol once widely favoured at commercial shops. The official IBM definition is "that which binds bLUe boxes together." It may be relevant that BLUe GLUe is also a 3M product commonly used to hold down carpets in dinosaur pens. [Jargon File] (1994-11-23)