Many people use the terms Internet and World Wide Web, or just the
Web, interchangeably, but the two terms are not synonymous. The
World Wide Web is only one of hundreds of services used on the
Internet. The Web is a global set of documents, images and other
resources, logically interrelated by hyperlinks and referenced with
Uniform Resource Identifiers (URIs). URIs symbolically identify services,
servers, and other databases, and the documents and resources that
they can provide. Hypertext Transfer Protocol (HTTP) is the main access
protocol of the World Wide Web. Web services also use HTTP to allow
software systems to communicate in order to share and exchange
business logic and data.