Intellectual property refers to creations of the human intellect such as inventions, books, photos and music. There are four main types of intellectual property: copyright, trademark, patent, and trade secret. Copyright protects creative works and allows the owner to control reproduction and distribution. A patent protects inventive ideas and processes. A trademark protects words and symbols associated with a business. Trade secrets protect confidential business information. Intellectual property owners face challenges of high-quality copying and widespread distribution online. Fair use and fair dealing laws allow limited use of copyrighted works for purposes such as research and review without permission. Technology impacts intellectual property through easy copying and sharing of digital files.