Other
Musipedia: The Open Music Encyclopedia
Are you trying to identify a song but can't remember the name of it or who wrote it? Musipedia is a music search engine that allows you to find a song by entering notes on a keyboard, tapping the rhythm or even singing into your computer.
Other
History of the Internet, Internet for Historians
This contains a description of earliest developments of the internet as well as recent innovations.
Google
Google for Education: Exploring Computational Thinking: What Is Ct?
Learn about computational thinking which involves a set of problem-solving skills and techniques that software engineers use to write programs that underlie the computer applications you use such as search, email, and maps.