Really? Wow, this younger generation don't know 'nuthin' 'bout computers! Kidding.
Sorry this is kinda off topic but since he asked.
mIRC stands for multiuser internet relay chat and has pretty much been around longer than the common network known as the internet. It's what you used prior to chatrooms, if you wanted to be in a chatroom.
mIRC is an Internet Relay Chat (IRC) client for Windows, created in 1995 and developed by Khaled Mardam-Bey. Although it is a fully functional chat utility, its integrated scripting language makes it extensible and versatile.