Squid is a popular open source web proxy cache[?]. It has a variety of uses, from speeding up a web server by caching repeated requests, to caching web, DNS, and other network lookups for a group of people sharing network resources.
It is primarily designed to run on Unix-like systems.
... Antiquity[?] it did not always have inherently negative implications, it merely designated anyone who assumed power for any period of time without a legitimate basis ...