A Hacker is a skilled computer user. The term originally denoted a skilled programmer particularly on skilled in machine code and with a good knowledge of the machine and its operating system. It is a fact that a good programmer could always hack an unsatisfactory system around until it worked.
in common usage, a hacker is a person who breaks into computers, usually by gaining access to administrative controls.The subculture that has evolved around hackers is often referred to as the computer underground. Proponents claim to be motivated by artistic and political ends, and are often unconcerned about the use of illegal means to achieve them.
Other uses of the word hacker exist that are not related to computer security but these are rarely used by the mainstream media
