Continued

• Search Engines
  A search engine is a set of programs which are used to search for information within a specific realm and collate that information in a database. People often use this term in reference to an Internet search engine, a search engine which is specifically designed to search the Internet, but search engines can also be devised for offline content, such as a library catalog, the contents of a personal hard drive, or a catalog of museum collections. Search engines help people to organize and display information in a way which makes it readily accessible.
• E-Commerce
  E-commerce (electronic commerce or EC) is the buying and selling of goods and services on the Internet, especially the World Wide Web.
• Portals
  A portal is a central place for making all types of information accessible to an audience of varying range.
• E-Marketplaces
  E-Marketplace Is an internet based trading community that includes many suppliers, manufacturers, their channels of distribution, support services that deliver finished goods and other value-added services