Michael S Hines wrote:
Likewise for the IBM Mainframe operating systems MVS,OS/390,z/OS - much ofIf PL/M is the language I am remembering from an embedded systems class
back in the 1980s, then it is not at all like PL/1. Rather, it is a
completely type-unsafe language. I would say "similar to C", in that it
has most of the same pitfalls. However, where ever C made an arbitrary
decision (either way is just as good) PL/M went the opposite direction
from C, making it very annoying for a C programmer to use.
which is written in (I believe) PL/M - a dialect much like PL/1.
Many of our Operating Systems seem to have evolved out of the old DEC RSTS
system. For example, CP/M had a PIP command. Later renamed to COPY in DOS.
When you've been around for a while, you start to see the same featuresI think .Net borrows most heavily from Java. Java in turn borrows from
everyone. The "managed code" thing in particular leads back to the
Pascal P-code interpreter; a kludge to make the Pascal compiler easier
to implement and port. The innovation in Java was to take this ugly
kludge and market it as a feature :)
converge.. UNIX had quotas, we got Quotas with Win XP Server (well earlier,
when you include the third party ISVs - as an add on). IBM had Language
Environment (LE) before .NET come along.
Crispin Cowan, Ph.D. http://immunix.com/~crispin/
CTO, Immunix http://immunix.com