What is Copyright
Copyright is the right that the producer of a creative work has been granted to prevent others from copying it. Unlike a patent, however, in most places (i.e., countries) you don't have to apply for a copyright - you get one automatically every time you produce creative work.
A creative work can be almost anything - a book, a song, a picture, a photograph, a poem, a phrase, or a fictional character. In the US, buildings built on or after December 1, 1990 are also eligible for copyright. Licenses may be granted to others, giving them the right to copy the work subject to certain conditions. A license is similar to a contract - the work may only be copied under the conditions given by the copyright holder or if one of the other exceptions to the copy right applies.