Yahoo Messenger is an instant-messaging service that allows users to converse one-on-one with friends and family over the Internet. The service allows a user to keep a list of friends and family to make it easier to start a conversation with them. Conversations take place in a conversation window. When this window closes, the entire conversation closes along with it. Opening a conversation window with that contact again creates a new, blank conversation window. However, the conversation is not deleted after the window is closed, and it is possible to view past conversations. Tips Warnings
