Texas Instruments TI-2001 GTI

The TI-2001 GTI sold in Europe was thought as a calculator for cars. With an integrated timer/clock you could measure your travelling speed, calculate your remaining time to the destination and some other car related calculations. The housing of the TI-2001 GTI was similar to the TI-30 LCD with it's huge battery compartment but added a small buzzer for the timer-alarm.