Photo By Bob Humphrey
This device, the Phystester (TM) Ignition Interlock System, is now under development by General Motors to keep intoxicated drivers off the road. To unlock the ignition system the driver must punch out a five-digit number on the key board. After a few seconds the number disappears and the driver has a short time to recall and punch the number just seen. If he is capable of doing this successfully, the driver can then start the car.