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, ...

What is a skill map/tree? Skill tree is a term used in video games, and it can be used for describing roadmaps for software project development as well. When you are building a software project, you ...

The Christmas tree is a wonderful and historic tradition that we don our homes with every Christmas to fill us with spirit and to lay our gifts underneath. However, it is the birth of our Lord and ...