Information Filters:Revival of Selective Dissemination of Information(SDI) Service in the Internet Era

SDI services were provided to the scientists by both manual and mechanical means from the earlier times to the present day. However, many of the information scientists presumed that with the advent of computer and online access to information, SDI services were not of much value to the scientists. Information filtering mechanisms that are being used to retrieve information from the Internet has given a new lease of life to Selective Dissemination of Information (SDI) services in this information age.