New,updatedandexpandedtopicsinthefourtheditioninclude:EBCDIC,Greycode,practicalapplicationsofflip-flops,linearandshaftencoders,memoryelementsandFPGAs.Thesectiononfault-findinghasbeenexpanded.Anewchapterisdedicatedtotheinterfacebetweendigitalcomponentsandanalogvoltages.*Ahighlyaccessi