1. Copyright law grants creators exclusive rights over their original artistic works for a limited time, generally the life of the author plus 70 years. It aims to incentivize creation and protect attribution and integrity of works. 2. Other forms of intellectual property include trademarks, which protect brand identities, and patents, which protect inventions for a limited period. 3. When copyright expires, works enter the public domain and can be freely used by anyone. Some limitations to copyright include allowing uses for criticism, parody, and access for disabled people.