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Twitter (/ ˈ t w ɪ t ər /) is an online news and social networking service where users post and interact with messages, "tweets", restricted to 140 characters.https://en.wikipedia.org/wiki/Twitter
Gmail is email that's intuitive, efficient, and useful. 15 GB of storage, less spam, and mobile access.https://mail.google.com/mail/u/0/
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