Source

1. In general a source is the location where information is obtained from. For example, if you were copying information from a CD to a computer the CD is considered the source and the computer is the destination.
2. When referring to computer programming or a software program, source refers to the code used to create the program. Commonly, the source code is not released to others outside of the company that developed the software.
3. When referring to a website, the source is the HTML code or other code used to generate a web page on a browser. Any code that is not server side can be viewed by any of your visitors with their browser. For example, users using Microsoft Internet Explorer can view the source of a web page by clicking on "View" and then "Source".

Also see: Destination, Program listing, Programming definitions