Step 1 : Introduction to the question "What does "IRC" mean to a computer geek?"
...IRC, or Internet Relay Chat, is a system for chatting over your computer. To chat with others, certain websites provide servers that allow people to chat via their computers. Examples of these sites include Talk City or networks such as EFnet or Undernet. These networks instruct you in how to download an IRC client to your computer that you then use to engage in chatting. There are popular IRC networks across the globe, such as IRCnet, EFnet, Undernet and Dalnet. Source: Whatis.TechTarget.com