The technology field is one that is particularly prone to use TLAs or three-letter-acronyms, to the point where we just repeat them and many times we don't know anymore what are we talking about. Do you know what all acromyms you use stand for? Especially in Technology, some of the acronyms make it into the general public's lingo and -for many people-, even if they would know what they stand for, they would be meaningless. ATM, LTE, GPA, GPS, GSM, ABS, QoS, IP, VoIP, etc.
It's all an Alphabet Soup. Make sure you get your TAD (Three-letter Acronym Decoder).