Found Words: ExoCortex
ExoCortex : From Greek "exō" for outside; and from Latin "cortex" for bark, the cortex is the outermost layer of the brain. My ExoCortex is my Brain outside my Brain. Hardware or Software. Clear? Early examples include 6,620 B.C.E. and 2,700 B.C.E., slide rulers, and HP and TI pocket calculators (see also social bookmarks (like Del.icio.us) links and Blogs).
Spotted via 0xDECAFBAD: Suffered a Stroke in my Exocortex and though out Charles Stross's Accelerando novel :
Manfred used to be a flock of pigeons literally, his exocortex dispersed among a passel of bird brains, pecking at brightly colored facts, shitting semidigested conclusions
Update based on comments: I like Ben Houston's definition :
exocortex (eks'o kor'teks) an organ that resides outside of the brain that aids in high level thinking.
and he should certainly get credit for it's modern re-coining. (and credit to Charlie for it's popularization). I also liked L.M Orchard's (Mr 0xDECAFBAD) turn of phrase.
further: Ben has created a wikipedia entry on Exocortex, with Whuffie. back to here and L.M.Ochard usage.