DEC RSX-11D and its COBOL compiler?

Guy N. decguy at
Tue May 29 08:38:03 CDT 2018

On Tue, 2018-05-29 at 17:30 +1000, Nigel Williams via cctalk wrote:
> On Tue, May 29, 2018 at 1:27 AM, Al Kossow via cctalk
> <cctalk at> wrote:
> > I have 11D on bitsavers.
> this is actually RSX-11D?

As I recall, IAS ("Interactive Applications System") was a timesharing
environment layered on top of RSX-11D.

When I was working with RSX-11D many years ago, I heard the opinion
expressed (maybe by DEC field service?) that RSX-11D was a pig, and IAS
was an elephant on a pig's back.

More information about the cctech mailing list