1. systems jock jock Systems Network Architecture SNA IBMs proprietary high level networking protocol standard, 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]
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