What is the difference between proxy server and reverse proxy server.

I will limit my discussion to web proxies, however, the idea of a proxy is not limited to web sites.

FORWARD proxy

Most discussion of web proxies refers to the type of proxy known as a "forward proxy."

The proxy event in this case is that the "forward proxy" retrieves data from another web site on behalf of the original requestee.

A tale of 3 computers (part I
Source: http://ravirajsblog.blogspot.com/2010/08/what-is-difference-between-proxy-server.html