Information retrieval systems

system to help searching for information

WolframAlpha is an online knowledge engine developed by Wolfram Research that has been around since 2009. It is offered as an online service that answers queries by computing answers from externally sourced data.

command-line utility

techniques that enable large-scale language models to retrieve and incorporate new information from external data sources

finding a domain name associated to an IP address

standard UNIX utility

information retrieval query language

human-edited web directory

Feature of Microsoft Windows

agrep (approximate grep) is an open-source approximate string matching program, developed by Udi Manber and Sun Wu between 1988 and 1991, for use with the Unix operating system. It was later ported to OS/2, DOS, and Windows.

Clinical search engine