This is third article of the series of Big Collection of Essential Computer Related Shortforms and Their Longforms. You can access other articles HERE.
For detailed information of the any topic you can refer to book Foundation of Computing, by P.K. Sinha and Priti Sinha.
Terms Related to Multimedia:
JPEG: Joint Photographic Experts Group.
MPEG: Motion Pictures Experts Group.
CAD: Computer Aided Design.
NTSC: National Television Systems Committee.
HD-MAC: High Definition Multiple Analogue Component.
SECAM: Sequential Couleur Avec Memorie.
MIDI: Musical Instruments Digital Interface.
HDTV: High Definition Television.
CAM: Computer Aided Manufacturing.
PAL: Phase Alternating Line.
OCR: Optical Character Recognition.
MUSE: Multiple Sub-Nyquist Sampling Encoding.
VGA: Video Graphic Array.
Terms Related To Internet and Computer Networks:
PPP: Point to Point Protocol.
HTTP: HyperText Transfer Protocol.
SGML: Standard Generalized Markup Language.
HTML: HyperText Markup Language.
XML: Extensible Markup Language.
URL: Uniform Resource Locator.
WWW: World Wide Web.
FAQ: Frequently Asked Questions.
FTP: File Transfer Protocol.
ISP: Internet Sevice Provider.
SLIP: Serial Line Internet Protocol.
FEP: Front End Processor.
LAN: Local Area Network.
WAN: Wide Area Network.
MAN: Metropolitan Area Network.
AM: Amplitude Modulation.
FM: Frequency Modulation.
PM: Phase Modulation.
PSTN: Pubilc Switched Telephone Network.
CSCW: Computer Supported Co-Operative Working.
DEC: Digital Equipment Corporation.
FDM: Frequency Division Multiplexing.
TDM: Time Division Multiplexing.
OSI: Open System Interconnection.
ARPANET: Advance Research Project Agency Net.
SNA: System Network Architecture.
References:
“Foundations of Computing” by P.K.Sinha and Priti Sinha.
Kiran Pagar - Founder of Engiblogger. I get fascinated with Technology advances in world. I love to study and work with those technologies. I am Mechanical Engineer, my main interests are Animation, Software Development and Blogging. 
nice!