Copyright

Collection of rights granted to an authors work

Public Domain:

Not protected by the copyright law. Either the copyright is expired, using public money or material was donated into a public domain.

Examples: Classical Literature, art, photography donated by the artist

Freeware:

Copyrighted work that you can use, copy or give away for free.

Examples: iTunes, Safari, free apps

Shareware:

Work that you can copy, use, and share for a limited time for free

Examples: Lit apps, pages, iMove, etc...

All Rights Reserved:

Allows the user to use the work, but only to the agreement.

Examples: Purchased apps, songs, and videos

Open Source:

Software that includes a source code with the idea that someone can improve it

Examples: Chrome, Firefox, Twitter, any app/service you can customize.