Abbreviation of Laptop motherboard's schematics symbols & letters

S.No	Code	Abbreviation
1	AC	Alternative Current
2	ACDRV	Adapter current drive
3	ACGOOD	Valid adapter active -low detect logic open drain output
4	ACIN	Adapter current input
5	ACN	Adapter current negative ( taken from current sensing resistor )
6	ACP	Adapter current positive ( taken from current sensing resistor )
7	ACOP	Adapter current over current protection
8	ACOV	Adapter current over voltage protection
9	ADP+	Adapter positive supply
10	ADP_ID	Adapter Identity
11	AGND	Analog Ground
12	ALWP	Always on Power
13	B+	Adapter or Battery power rail to power the circuit ( this is the point motherboard takes power to all the other areas of the motherboards power requirement)
14	BATT	Battery
15	BAT+	Battery power rail to power circuit
16	BAT_DRV	Battery MOSFET's gate driver
17	BAT_V	Battery voltage
18	BOM	Bill of material management
19	BT	Button
20	BT_EN	Bloototh Enable
21	BUZER	It means connected
22	BYP	Bypass
23	CHGEN	Charge enable active-low logic input
24	CIN	Input Capacitor
25	CLK_EN	Clock Enable
26	CN	Connector
27	CRT	Cathode Ray Tube
28	CSIN	Current Sensor Input Negative
29	CSIP	Current sensor input positive
30	DC	Direct Current
31	DM	DIM Socket / Socket Memory / DDR Socket
32	DOCK	Docking Socket
33	EC	Embedded Controller
34	EC_ON	Embedded Controller Enable / IO Enable / SIO enable
35	EMI	Electromagnetic Interference
36	EN	Enable
37	ENTRIP	Enable Terminal
38	F	Fuse
39	FSEL	Frequency Select input
40	GATE	Trigger Mosfet Gate
41	GND	Ground
42	GP	Ground Pin
43	GPI	General Power Input
44	GPIO	General power input and output
45	HDMI	High definition multimedia interface
46	ID	Continuous Drain Current
47	IDM	Pulsed Drain Current
48	IIN	Operating supply current
49	IIN (SHDN)	Shutdown supply current
50	IIN (STBY)	Standby Supply Current
51	IS	Continuous source current
52	IVIN	Battery Supply Current at VIN pin
53	JP	Jumper Point ( there are few jumper points will be there on the motherboard for troubleshooting and separating circuits, this jumper point help us to troubleshoot easily )
54	KBC	Keyboard Controller / IO / SIO / EC - all are same

 

Components short letter in motherboard's circuit & in Schematics