Computer programming is a problem solving and writing instructions to computers. Different kinds of computer programs does not always have the same programming language use to create them. Different languages have their different strengths and weaknesses, making some kinds of programs easier or more difficult to create. But the basic principles for creating computer programs remains the same. Skilled programmers can switch to a new programming language in a few hourswhile beginners should pick one language at a time.

Three Basic Sizes of Computer Programs:
1 - Trivial programs
    * These are programs that a skilled programmer can write in less than two days of coding.
2 - Small Programs
    * These are programs that one skilled programmer can write in less than one year of full time work.
3 -  Large programs
    * These are programs that require more than two to five man-years of labor, normally written by programming teams(which can exceed 1000 skilled workers).