Directron.com, USA

We use Debian GNU/Linux as a choice for fast stable servers and workstations. Currently, our in-house DHCP, intranet, NAT, NIS, and even NT Domain Authentication servers all run Debian. Several of our employees use Debian on the desktop, and we are currently migrating towards diskless workstations for many of our employees, again, based on Debian, talking to a Debian TFTP host.