The world of computer science is so large and complicated so it need years to learn for example Communication Networking is one of the computer science branches which specifies in applying communication between two or more computer or communication devices, Computer application is one of the interesting filed of computer science, it deals with creating computers application and phone application using programming languages like C, C# and java. Typing speed is very important in all computer field , the minimum typing speed allowed to be employed in an organization is 35-40 wpm so start practicing and you will be fast.