In <H000103c093e2249@MHS> [log in to unmask] writes:

> ....as further attested to by the ad in the Washington Post a few years
> ago for HP 3000 help at the U.S. Supreme Court.
>
> At the time, the national headquarters for the American Red Cross
> was using the 3000 as well.

Red Cross does. I *think* the supreme court's still plugging.

Some other DC area notables;

US ARMY (various locations around the world)
US NAVY (many locations around the world)
Dept of Energy
US Dept of Agriculture
National Security Agency  (did... dunno if they still do, and if so, I'm
                           sure they'd deny it! ;-) )
One of our regional Power Companies

Several related defense contractors

Maryland's Department of Education

Maryland National Capital Park and Planning Commission

A couple Virginia state government departments.

Two of the top-10 (largest # students in the country) school systems;
  Prince Georges County Maryland
  Fairfax County Virginia

Two other area school systems that I know of; several area colleges and
community colleges. At least one county government. A county library
system.

*Many* associations

Three other airlines (not previously mentioned).

Two national real-estate companies.

At least one national moving company.

Another notable out west; Warner Brothers (the movie people)

          -Chris Bartram