Texas Instruments TI-1000 Handheld Electronic Calculator

This simple handheld electronic calculator has a black plastic case, metal keyboard with silver-colored trim, and rectangular plastic keys. The twenty keys include ten digit keys, a decimal point key, a total key, four arithmetic function keys, a percent key, a change sign key, an off key, and an on/clear entry/clear key. A mark behind the keyboard reads: TI-1000. Behind this is an eight-digit LED display. A mark behind it reads: TEXAS INSTRUMENTS. The power jack is on the right side.

The back of the calculator has a compartment for a nine-volt battery at the center. The cover for the compartment is marked on the inside: 2 (/) 1015633. A mark above the compartment reads: TEXAS INSTRUMENTS (/) electronic calculator. Below the compartment is a space for a serial number but no serial number. A mark reads: LTA5078 (/) ASSEMBLED IN USA.

The calculator comes in a cardboard box. A mark on it reads in part: 1977 Texas Instruments Incorporated.

Compare 1986.0988.052. According to the online Datamath Museum, TI-1000 calculators with silver-colored trim on the keyboard were made after those with gold-colored trim.

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