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, ...

Mostly sunny. High temperature around 32F. Dew point will be around 19F with an average humidity of 74%. Winds will be 9 mph from the SW. A chance of snow showers this evening then snow after midnight ...

The history of the Apple logo design is a masterclass in ruthless simplification and strategic branding. Each change was a calculated business move from the complex Newton crest to today's flat icon.

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