Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...

X announced that it will display the region in which an account is based. The information is visible under the new "About This Account" section. X removed the feature for some accounts on Saturday.

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Forbes contributors publish independent expert analyses and insights. Kate O’Flaherty is a cybersecurity and privacy journalist. Elon Musk’s AI firm xAI has purchased X, formerly Twitter in a $33 ...