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Google takes on AOL, Yahoo and Microsoft with its own instant-messaging program that allows text chat and computer-to-computer voice connections. As you begin, Google Talk will pre-load your Gmail contacts with your most frequently-emailed contacts at the top of your Friends list.
The availability status of your contacts is coded next to their name, with their connection availability on the right. You can initiate a call or e-mail from the IM chat box.
You can customize your settings including managing your friends list, blocking unwelcome people and saving your chat history.