Telnet servers give users the ability to log on to a host computer and perform tasks as if they're actually working on the remote computer itself. Users can access the host through the telnet server from anywhere in the world using a telnet client. The second type of server offered in this section is the WAIS server. Before the arrival of the Web, Wide Area Information Search (WAIS) servers were critical for allowing users to perform searches for key words in files. While not as popular today, developers looking to round out their selection of Internet services will want to give consideration to the WAIS servers listed below.