First, who is a programmer?

A computer programmer can be a specialist in one area

of computer programming, or a generalist who writes

code for many kinds of software.

The term 'programmer' can be used to refer to a software

developer, software engineer, computer scientist, or

software analyst

What he does

A computer programmer figures out the process of

designing, writing, testing, debugging/troubleshooting and

maintaining the source code of computer programs. This

source code is written in a programming language so the

computer can 'understand' it. The code may be a

modification of an existing source or something

completely new.