A buddy list is now a common feature of most online programs that support person-to-person messaging and chat. It is most commonly used by AOL programs, like the AOL Messenger program. With a buddy list you can add and remove those people you chat to most often over the web. This can include friends, family and fellow workers. With a buddy list it shows who is online at the same time, and will highlight if someone has just connected and signed onto the program and those people who have just left.