Ўзбекистон республикаси олий ва ўрта махсус таълим вазирлиги ўзбекистон давлат жаҳон тиллари университети инглиз тили назарий аспектлари №1

Abbreviation is a process of shortening the result of which is a word made up of the initial letters or syllables of the components of a word-group or a compound word. We can distinguish the following types of abbreviation:

1. 
   Graphical abbreviation is the result of shortening of a word or a word-group only in written speech (for the economy of space and effort in writing), while orally the corresponding full form is used:
   

days of the week and months, e.g. Sun., Tue., Feb., Oct., Dec.;
states in the USA, e.g. Alas., CA, TX;
forms of address, e.g. Mr., Mrs., Dr.;
scientific degrees, e.g. BA, BSc., MA, MSc., MBA, PhD.;
military ranks, e.g. Col.;
units of measurement, e.g. sec., ft, km.
Latin abbreviations, e.g. p.a., i.e., ibid., a.m., cp., viz.
internet abbreviations, e.g. BTW, FYI, TIA, AFAIK, TWIMC, MWA.

2.