What more would you like to learn?

I would like to learn more about other programs on the computer. In the computer class, I learned about Microsoft Windows, Power Point, Hardware, Microsoft Word, and HTML. However, I think there are other useful programs on the computer, so I would like to know about these. Also, I would like to learn more about the Internet. For example, how we can trust the information in the web site. When I was a high school student, my English teacher told the class that when we write the essay and we need to use information from the Internet, we can only use the URL says ".edu" or ".org". I wonder why it only ".edu" or ".org", and still I do not know. In addition, I want to know about the mechanism of chatting because it might simple and do not have anything to explain, but for me, it is kind of mystery of the Internet.