How can a web-based system operate in my organisation?
You may well use MSN or another form of software that is not held on your own PC. It comes from a central computer or server within the organization and is “accessed” over a network. With this type of product, known as an ASP (application service provider) or SaaS (Software as a Service) the principle is exactly the same but the “host” server that holds the software and database is accessed over the Internet.