What are initialisms?

Some articles on initialisms, initialism:

Lulzwut - Analysis
... Haig singles out LOL as one of the three most popular initialisms in Internet slang, alongside BFN ("bye for now") and IMHO ("in my honest/humble opinion") ... He describes the various initialisms of Internet slang as convenient, but warns that "as ever more obscure acronyms emerge they can also be rather confusing" ... Bidgoli likewise states that these initialisms "save keystrokes for the sender but might make comprehension of the message more difficult for the receiver" and that "lang ...
Lulzwut - Spread From Written To Spoken Communication
... LOL, ROFL, and other initialisms have crossed from computer-mediated communication to face-to-face communication ... Conversely, a 2003 study of college students by Naomi Baron found that the use of these initialisms in computer-mediated communication (CMC), specifically ... Out of 2,185 transmissions, there were 90 initialisms in total, only 31 CMC-style abbreviations, and 49 emoticons ...
List Of Acronyms And Initialisms: Z
... This list contains acronyms, initialisms, and pseudo-blends that begin with the letter Z ... SARS = severe acute respiratory syndrome initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g ... = an abbreviation whose extra or omitted letters means that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words) ...
Lulzwut
... It is one of many initialisms for expressing bodily reactions, in particular laughter, as text, including initialisms for more emphatic expressions of laughter such as LMAO ("laugh(ing) my ... These initialisms are controversial, and several authors recommend against their use, either in general or in specific contexts such as business communications ...