[Info-vax] factory codes

[H Vlems]

I started to document my VAX and AXP systems. The system serial number
is documented too, handy while applying for a Montagar license. The
serial number is of the form:
<factory code> <last digit of year> <production week> <5 character
serial no>
Most of the serial numbers start with AY, which is Ayre, Scotland
IIRC. Which is obvious, since I'm in the Netherlands. But there are
other codes, and I'd like to know  where they're from.
What do these factory codes mean:
 AB
 TA
 KL
 NI
 PY

Thanks,
Hans