From: Ian King
Sent: Monday, May 18, 2009 3:06 PM
> From: Ethan Dicks
> Sent: Monday, May 18, 2009 1:55 PM
> On Mon, May 18, 2009 at 4:34 PM, Mark Tapley
<mtapley at swri.edu> wrote:
>> Compuserve
[snip]
> The article also says "For those of us who
were CompuServe users back
> when its user IDs consisted of lots of digits and a mysterious comma,
> it's a depressing fate." I haven't memorized my old PPN, but I do
> have it in easy reach at home on the subscriber label of ancient
> copies of "Online" magazine.
And what were those mysterious IDs? CompuServe was
run on DEC PDP-10
systems, and these IDs were standard DEC user IDs! In the format
[group, user], this ID structure was used across many DEC OS products,
including TOPS-10/20, RSX-11 and VMS. It's a shame he didn't mention
(or know?) that....
I have to point out that TOPS-20 does not, in the general case, use PPNs.
There is a UI command to translate between usernames and faux PPNs, but
this has been a relic since TOPS-20 v.3A (c. 1977--current version is
7.1, c. 1995).
Other than TOPS-20, which did not originate at DEC, almost all DEC
operating systems used PPNs, including those on the 18-bit and 12-bit
families.
Rich