An acronym is a series of words, shortened to each of their first letters. For example, LOL is a very common acronym, which stands for many different variations of words, such as Laugh Out Loud, or Lots Of Love. An acronym works better if the actual acronym spells out a different word. For example, BOOK, which means Book Of Organised Knowledge (book by Anthony Burgees). Some are famous Acronyms, such as those of the media items, CD (Compact Disc), and DVD (formerly known as Digital Video Disc, but is now known as Digital Versatile Disc).