Mike writes:

> NT is without a doubt more open than MPE. API's are the primary foundation
>  for programming interfaces when developing Microsoft products and can be
>  linked to more, "off the shelf" software.

An API is nothing more than a system subroutine. On the HP3000, they're called
"intrinsics". Otherwise, the concepts are identical. For more information on
HP3000 system intrinsics, see:

     http://docs.hp.com/cgi-bin/doc3k/B3265090821.13550/1

...particularly so the first section, "What is an intrinsic?"

(see, I told you that these on-line manuals come in handy :-).

Wirt Atmar