Typically, acronyms and initialisms are written in all capital letters to distinguish them from ordinary words. (When fully spelled out, the words in acronyms and initialisms do not need to be capitalized unless they entail a proper noun.) An acronym is pronounced as a single word, rather than as a series of letters.

Do I capitalize abbreviations?

Although an abbreviation is composed of capital letters, the full words that define the abbreviation are not always capitalized. Each case involves considering if the word is an official name or a proper noun.

What is initialisms and example?

An initialism is a word made from the first letters of each word in a phrase. Unlike acronyms, initialisms cannot be spoken as words: they are spoken letter by letter. Examples of initialisms are: DVD - Digital Versatile Disc. CD - Compact Disc.