<storage> (NRZI) A recording method used for 9-track magnetic tapes (200 and 800 BPI) where a zero is represented by a change in the signal and a one by no change.
NRZI is also used extensively in SDLC communications. VTAM has a parameter NRZI=YES|NO.
Compare Phase Encoded, GCR.
Try this search on Wikipedia, OneLook, Google
Nearby terms: Nonpareil « non parity « non-polynomial « Non Return to Zero Inverted » nontrivial » Non-Uniform Memory Access » non-uniform quantising logarithmic compression