P.H.I.
In home and hobby circles, a hacker is a person who enjoys exploring the limits of what is possible, in a spirit of playful cleverness. They may also heavily modify software or hardware of their own computer system. It includes building, rebuilding, modifying, and creating software (software cracking, demo scene), electronic hardware (hardware hacking, modding), or anything else, either to make it better or faster or to give it added features or to make it do something it was never intended to do. Hobby home computer hacking originated around the MITS Altair, yet the spirit of hacking has been embodied in real projects since the advent of simple tools