Public Access = This is an extensive sub-category of FREE resources
Communication is Freedom
There is more to the Internet than just what you see in your web browser. An example of other protocols that many Internet users have had interactions with are the Email protocols. When you send an email you use SMTP, and when you receive an email you use POP or IMAP.
You might be surprised, but most of the servers on the Internet, particularly those using protocols other than HTTP, are not open for public access. It is the purpose of this directory therefore to help the general public, teachers and librarians, by listing those servers and services available on the Internet that are accessible by the general public.
If some of the below protocols seem to provide similar functionality, it is because the do! Marketing hype and attempts to corner markets have caused minor feature differences to be touted as revolutionary paradigm shifts. On the other hand, this also means that if for some reason a popular protocol is unavailable or censored, another protocol may be able to be used that will provide similar functionality. Remember, just because an Internet protocol is not popular, it does not make it any less useable. In fact, unpopularity makes a protocol less vulnerable to mischief. Also, because many of these alternative protocols work exceptionally well on less capable hardware or older operating systems, they close the Digital Divide still being faced by the poor or underserved.