this isn't a stripboard post for a change (though one is coming soon). however it is useful to know what I'm about to write if you salvage parts or want to fix electronic items.
on PCBs (and other electrical installations) you will often be confronted with silkscreen designators like shown below (the white writing on the board)
here is a list of what each abbreviation stands for.
A - Separable assembly or sub-assembly (e.g. printed circuit assembly)
AT - Attenuator or isolator
BR - Bridge rectifier
BT - Battery
C - Capacitor
CN - Capacitor network
D - Diode (including Zeners, thyristors and LEDs)
DL - Delay line
DS - Display
F - Fuse
FB or FEB - Ferrite bead
FD - Fiducial
FL - Filter
G - Generator or Oscillator
GN - General Network
H - Hardware
HY - Circulator or Directional coupler
J - Jack (least-movable connector of a connector pair) | Jack connector (connector may have "male" pin contacts and/or "female" socket contacts)
JP - Link (Jumper)
K - Relay or contactor
L - Inductor or coil or ferrite bead
LS - Loudspeaker or buzzer
M - Motor
MK - Microphone
MP - Mechanical part (including screws and fasteners)
P - Plug (most-movable connector of a connector pair) | Plug connector (connector may have "male" pin contacts and/or "female" socket contacts)
PS - Power supply
PZ - Piezo Buzzer
Q - Transistor (all types)
R - Resistor
RL - Relay
RN - Resistor network
RT - Thermistor
RV - Varistor
S - Switch (all types, including push-buttons)
SCR - Thyristor
T - Transformer
TC - Thermocouple
TH - Thermistor
- types of thermistors are..
PTC - Positive temperature coefficient - the resistance rises with increased heat
NTC - Negative temperature coefficient - the resistance decreases with increased heat
TUN - Tuner
TP - Test point
U - Inseparable assembly (e.g., integrated circuit)
V - Vacuum tube - Or VALVE!
VR - Variable resistor (potentiometer or rheostat)
X - Crystal
Y - Crystal or oscillator
Z (or ZD) - Zener diode
AE: Aerial, antenna
B: Battery
BR: Bridge rectifier
CRT: Cathode ray tube
CR: Diode
DSP: Digital signal processor
FET: Field-effect transistor
GDT: Gas discharge tube
IC: Integrated circuit
J: Wire link ("jumper")
JFET: Junction gate field-effect transistor
LA: Lightning arrester
LCD: Liquid crystal display
LDR: Light-dependent resistor
LED: Light-emitting diode
MCB: Miniature circuit breaker
Mic: Microphone
MOSFET: Metal-oxide-semiconductor field-effect transistor
MOV: Metal oxide varistor
Ne: Neon lamp
PLC: Programmable logic controller