current-users: What are these references to a /proc directory?

Subject: What are these references to a /proc directory?
To: None <current-users@NetBSD.ORG>
From: Gerald C. Simmons <simmons@darykon.wa.com>
List: current-users
Date: 01/03/1997 07:29:27

I've seen a few references (in /bin/sh's and such) that refer to, and
are check for things in /proc. What's its purpose and who do I enable
it?

Gerry Simmons
simmons@darykon.wa.com