World Wide Web and killer app of the Internet
Most Internet applications were developed by computer scientists more often concerned with performance and extensibility than with usability. Applications such as telnet (for running terminal sessions on remote computers), FTPs (File Transfer Protocol) for transferring files between two computers) require from the user a high level of awareness about the operating systems of the local and remote computers. While not entirely unusable by less technically sophisticated those applications nevertheless had a sufficiently high cost of entry to turn off many potential users.
No serious contender for a killer application appeared until the World Wide Web began and graphical browser became available. It has become hassle to track down sources of information on Internet; connect to server and attempt to locate the desired data. The WWW offers improvements in both to end user who can point and click to navigate the web and locate interesting or necessary information and to information providers who can offer access to their own data as well as other related providers to a much wider audience. The result was an application that appealed to a huge potential user base: those wanting access to free or cheap information and entertainment, but without the hassles of figuring out how to work all the different computers and programs.
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