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, ...

Core Java – Daily Learning: A hands-on, daily-updated repository with practical Java programs on patterns, functions, arrays, OOP, and mini projects. Ideal for beginners and learners to practice, ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Marguerita is a Certified Financial Planner (CFP), Chartered Retirement Planning Counselor ...