Monday, August 1, 2016

Internet Services


Internet Services allows us to access huge amount of information such as text, graphics, sound and software over the internet. Following diagram shows the four different categories of Internet Services.

Communication Services 

  • Electronic Mail
  • Telnet
  • Newsgroup
  • Internet Relay Chat (IRC)
  • Mailing Lists
  • Internet Telephony (VoIP)
  • Instant Messaging

Information Retrieval Services

  • File Transfer Protocol (FTP)
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Evolution of the Web






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Subject Gateway

 Subject Gateway

subject gateways contain web resources that have been evaluated and quality checked by subject experts. Below are some subject gateways you might find useful.

The Internet became a major medium in the information world. It offers access to massive amount of information resources but the fact remains that it is still very hard for people to locate high quality information among the general chaos. In the past few years the issue of resource discovery on the Internet has been the focus of much work by many different communities. Subject Gateways provide links to information resources (documents, collections, sites or services), predominantly accessible via the Internet. 






Types of subject gateway
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