??? 09/07/05 09:57 Read: times |
#100740 - -ve, +ve, xtal Responding to: ???'s previous message |
Have been around since electrical schematics were first drawn. Nothing new under the sun. What about uprocessor (u=mu - can't work out how to include symbols in this box)? Or rx, tx, wkg, and lots of others I can't remember. All preceeded SMS...
Used to be lots of 'Q' codes originally developed by morse signallers - QRM-interference, QRT-end of tx, QTH-home, QDM-direction, QST-change of frequency, and many many more. Dave |