This document lists common technology acronyms and their meanings including IOS for Internetwork operating system, GPRS for Global packet radio service, and MP4 for MPEG layer-4 audio format. It also defines several other common tech terms such as JPEG, LED, MAC, PDF, SD, DHTML, SMS, and MMS.

1. IOS-Internetwork operating system
GPRS-Global packet radio service
MP4-MPEG layer-4 audio
MPEG-Moving pictures experts group
JPEG-Joint photograpic experts group
LED-Light Emmiting Diode
MAC-Media access control
PDF-Portable document format
SD-Standard definition
DHTML-Dynamic hyper text markup language
SMS-Short message service
MMS-Multimedia messaging service
IOS-Internet operating system