Handout
Wikimedia

Wikipedia: Png

For Students 9th - 10th
Encyclopedia entry that defines a PNG graphic file and explains how and why it was created. Sections of the article include history and development, technical details, support and usage, alternatives, see also (related information), and...
Website
Other

Elated Communications: Understanding Image Formats

For Students 9th - 10th
This tutorial looks at the three common image formats used on the web: GIF, JPEG and PNG. You'll learn how these image formats work, and where to use each type of image in your web pages.