Equipment - Object, Telesensory Systems, TSI Speech Plus calculator, 1975

Historical information

This speaking calculator was designed to perform several functions as well as memory, in synthetic voice. With two modes - visual or visual plus voice - it was powered by a nickel cadmium rechargeable battery or by a special adaptor from mains supply voltage.

Physical description

Dark brown rectangular box with numerical and mathematical keyboard

Inscriptions & markings

TSI

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