It is very important to know that the cellphones send and receive information using invisible radio waves which is a technology called wireless because it uses no cables while the fiber optics sends information coded in a beam of light down a glass or plastic pipe .
We must know that iPad is portable and easy to carry , there are many useful apps for teaching and learning iniPads , Theyhave free and cheap educational apps , andThey have large screens , So , iPads are very important in the schools and colleges .
