Historical information

First programmable calculator used by Thompsons Castlemaine Ltd.

Physical description

.1) Hewlett Packard programmable calculator model HP9100A.
Cream coloured metal housing.
Four segment keyboard with keys coloured grey, cream and fawn.
.2) Selection of 10 diagnostic cards for above in a plastic case with a clear plastic hinged push back lid.

Inscriptions & markings

.1) Serial number on rear plate "816-00508".
.2) Cards part number 5060-5919.