CR was for crystal diode, which was what early diodes were made of. Lou > ---------- > From: Jack Olson[SMTP:[log in to unmask]] > Reply To: DesignerCouncil E-Mail Forum.;Jack Olson > Sent: Monday, January 10, 2000 1:22 PM > To: [log in to unmask] > Subject: [DC] Reference Designators > > Something I overheard this morning got me wondering... > > Have any of you been around long enough to know why a diode would have a > designator of CR? What does the CR mean? > > What does the U mean on an Integrated Circuit? > > Is the K on relays arbitrary since R is used by resistors? > > Does anyone really use P anymore for plugs? > (everything I've seen lately is J on connectors, no matter if it is a > socket > or a plug) > > What do you use for submodules or subassemblies? > > Not really important, I was just curious.... > > Jack >