Physical description

Hewlett Packard early model programmable calculator.
Dark brown and cream metal casing.
5 banks of keys coloured brown and orange.
Instruction sheet on lift up flap RH side top.
2 removable program cartridges, one pre-programmed, the other user programmable.
Carry handle on front.

Inscriptions & markings

Model No." 9820A", Serial No. "1144A00851"