If you're looking for a definition to a technical term relating to computers, software, the internet, etc. Jim Hamm recommends this site. He notes, "Since acronyms are used frequently in speaking 'computerese' this site can be helpful in finding interpretations of what an acronym means."
Interestingly, each term includes "a tech factor rating from 1 to 10, which indicates how advanced a term is. Terms with low tech factors are common and easy to understand, while terms with higher tech factors may be less common and contain advanced terminology. Terms with tech factors from 1 to 5 are typically important to know, while terms with tech factors from 6 to 10 are not as necessary to know. However, reading up on higher-rated terms may allow you to impress your friends," so says TechTerms.