Some commercial sites offer software for sale, services, and other advertising.
Academic resources are also available on WWW, but some institutions also keep files Gopher, FTP and Telnet sources. Let's look at an academic site available on WWW, this one at Harvard University. Remember, when you have seen enough of Harvard, you can come back to this page by opening GO MENU, and selecting John's Research Resources Page 2. The WWW page at Harvard contains information mainly of interest to students, staff and prospective students at Harvard, but there is some information of interest to researchers. Most universities are currently making information available on the Internet.