The New Hacker's Dictionary

2. n. An IBM machine, especially a large (non-PC) one.

Blue Glue // n.

[IBM] IBM's SNA (Systems Network Architecture), an incredibly losing and bletcherous communications protocol widely favored at commercial shops that don't know any better. The official IBM definition is "that which binds blue boxes together." See fear and loathing. It may not be irrelevant that Blue Glue is the trade name of a 3M product that is commonly used to hold down the carpet squares to the removable panel floors common in dinosaur pens. A correspondent at U. Minn. reports that the CS department there has about 80 bottles of the stuff hanging about, so they often refer to any messy work to be done as 'using the blue glue'.

blue goo // n.

Term for 'police' nanobots intended to prevent gray goo, denature hazardous waste, destroy pollution, put ozone back into the stratosphere, prevent halitosis, and promote truth, justice, and the American way, etc. The term 'Blue Goo' can be found in Dr. Seuss's "Fox In Socks" to refer to a substance much like bubblegum. 'Would you like to chew blue goo, sir?'. See nanotechnology.

Blue Screen of Death // n.

[common] This term is closely related to the older []Black Screen of Death but much more common (many non-hackers have picked it up). Due to the extreme fragility and bugginess of Microsoft Windows misbehaving applications can readily crash the OS (and the OS sometimes crashes itself spontaneously). The Blue Screen of Death, sometimes decorated with hex error codes, is what you get when this happens. (Commonly abbreviated BSOD.)

The following entry from the Salon Haiku Contest, seems to have predated popular use of the term:

Windows NT crashed.
I am the Blue Screen of Death
No one hears your screams.

blue wire // n.

[IBM] Patch wires (esp. 30 AWG gauge) added to circuit boards at the factory to correct design or fabrication problems. Blue wire is not necessarily blue, the term describes function rather than color. These may be necessary if there hasn't been time to design and qualify another board version. In Great Britain this can be 'bodge wire', after mainstreanm slang 'bodge' for a clumsy improvisation or sloppy job of work. Compare purple wire, red wire, yellow wire, pink wire.