[Info-vax] Security, support and VMS, was: Re: A new VMS?

[Arne Vajhøj]

On 5/4/2021 8:46 AM, Bill Gunshannon wrote:
> On 5/4/21 8:11 AM, Simon Clubley wrote:
>> VMS is not Unix or Windows.
>>
>> This is good because it has functionality that neither of them have.
> 
> I was going to let this slide by, but it just stuck in my
> craw.
> 
> What "functionality" does VMS have that Unix and Windows don't?
> 
> Remember, we are talking "functionality", not just doing something
> in a different manner.

At a super high level an OS manage processes/threads, memory
and IO. VMS, Unix, Linux, Windows, z/OS, Multics etc. all does that.

At a more detailed level there are some differences in what they can do.
For process creation then *nix has fork and its memory & file handling
that VMS does not do, while VMS got a bunch of SYSGEN and UAF parameters
controlling limits.

But typical those differences does not prevent anything from being
done on the OS< but it can make a port to the OS more difficult
(read: more expensive).

Arne