Vdd stands for FET Positive supply voltage
Vcc stands for BJT Positive supply voltage
Vss stands for FET Negative supply, ground
Vee stands for BJT Negative supply, ground
CRT:cathode ray tube
D or CR: diode
F: fuse
GDT: gas discharge tube
IC: integrated circuit
J: wire link
JFET: junction gate field-effect transistor
L: inductor
LCD:Liquid crystal display
LDR: light dependent resistor
LED: light emitting diode
LS: speaker
M: motor
MCB: circuit breaker
Mic: microphone
Ne: neon lamp
OP: Operational Amplifier
PCB: printed circuit board
PU: pickup
Q: transistor
R: resistor
RLA: RY: relay
SCR: silicon controlled rectifier
FET: field effect transistor
MOSFET:Metal oxide semiconductor field effect transistor
TFT: thin film transistor(display)
VLSI: very large scale integration
DSP: digital signal processor
SW: switch
T: transformer
TH: thermistor
TP: test point
Tr: transistor
U: integrated circuit
V: valve (tube)
VC: variable capacitor
VFD: vacuum fluorescent display
VR: variable resistor
X: crystal, ceramic resonator
XMER: transformer
XTAL: crystal
Z: zener diode
PCB: printed circuit board
PU: pickup
Q: transistor
R: resistor
RLA: RY: relay
SCR: silicon controlled rectifier
FET: field effect transistor
MOSFET:Metal oxide semiconductor field effect transistor
TFT: thin film transistor(display)
VLSI: very large scale integration
DSP: digital signal processor
SW: switch
