Thank you for using the Jiskha Homework Help Forum. When you encounter a term you don't understand, if you can't ask the person who used that term, try any good dictionary or a Google Search:
1. (PDF file to download):
5. (a book you might be able to find in a library or read the excerpt below): http://www.amazon.com/Multimedia-Database-Retrieval-Human-Centered-Communication/dp/038725627X
Apparently multi-media is going in this direction!