The first alarm clock could only ring at 4 a.m.
120
Any modern jet is capable of breaking the sound barrier.
34
Whale oil was used in automobile transmissions as late as 1973.
56
All GPS units sold in the civilian market have to be programmed to deactivate themselves if they detect they are travelling faster than 1200 MPH or are above 60,000 feet in altitude to prevent them being used in intercontinental ballistic missiles.
2
Mico headphones read your brainwaves and select music based on your state of mind.
7
The ball on top of a flagpole is called a 'truck'.
24