The term intellectual property refers to artistic and commercial "works of the mind." Examples of artistic intellectual property include creative works such as musical or literary works, while commercial intellectual property includes trademarks and patents. Intellectual property law gives owners of creative and commercial intellectual property certain exclusive rights to their work, allowing creators of intellectual property the right to control how their work is used, reproduced, or adapted. There is an abundance of intellectual property on the Internet, which has led to a rise in intellectual property violations. Many web users display creative works on their personal website, and copyright notices are not always present. In some cases violations are accidental, due to web users with little knowledge of intellectual property law. If a person copies someone else's intellectual property without proper attribution and displays it on their website, intellectual property law classifies that as a violation. Often, contacting the website owner in violation is all that is needed to clear up a problem, however in some cases tougher legal action may be needed to resolve an intellectual property issue.