What is CLOS

Answer 1

Sleepy Koala he includes the lisp tag, which means he is asking about CLOS(Common Lisp Object System)

CLOS is the extension to enable OOP in common lisp with classes & methods.
#see resources below for more info.
https://en.m.wikipedia.org/wiki/CLOS
http://cs.northwestern.edu/academics/courses/325/readings/clos.php

Answer 2

In the field of telecommunications, a Clos network is a kind of multistage circuit switching network, invented by Edson Erwin US patent 2244004 in 1938 and first formalized by Charles Clos in 1952, which represents a theoretical idealization of practical multistage switching systems.

Source: Google

Answer 3

thanks guys