A "zzap" is the mortal enemy of today's sophisticated electronics designs. A "zzaap " can cause a circuit to "lock up" or "hang" -delete bits form a data stream or mysteriously insert bits that aren't supposed to be there or, worst of all, cause the sudden failure of critical integrated circuits. M. Bruce Corp takes you inside the often mysterious world of electrostatic discharge (ESD), radio frequency interference (RFI, and electromagnetic interference (EMI) to show how these can cause a bewildering array of transient problems or catastrophic failures.