Copyright

Copyright is a law that all of someones work is their own. If someone for example, say Alex wrote about his knowledge of history through a summary on the internet that's his. If Aron likes it and wants to use the information she can't use his exact words that's illegal.If Aron decides to use it than she has to cite the source by clearly showing that the work isn't hers either using a citation machine or by saying, "This work is not mine it belongs to Alex." That means its Alex's authorship. Copyright is intangible. that means you can't touch it but it's there like feelings you know it's there but you cannot touch them. Over the years copyright has been embodied by becoming a law. If you infringe the copyright law then you will be charged or in some cases sent to jail. If someone posts to the Internet that means its there's. 70 years after the authors death you may use there work every 28 years from posting it you can renew the work.