Abbreviations

Acronyms: Acronyms are abbreviations formed by the initial letters of a group of words pronounced as a word (e.g., NASA).

Initialisms: Initialisms are abbreviations formed by the initial letters of a group of words pronounced letter by letter (e.g., FBI).

Contractions: Contractions are abbreviated forms created by combining two words and replacing missing letters with an apostrophe (e.g., can't).