Copyright
A collection of rights granted to an author's work.
Public Domain
Isn’t protected by copyright laws; too old, created with public money, author donated, etc.
Shareware
Copyrighted work that you can copy and give away for free for a limited time.
All Rights Reserved
Allows the purchaser to use the software according to the details in the licence agreement.
Open Source
Software that includes the source code with the idea that someone can improve it.