Adhesives/Glue
Around 1750, the first glue patent was issued in Britain for a glue made from fish.

Air Bags
In 1973, the General Motors research team invented the first car safety air bags that were first offered in the 1973 model Chevrolet as an option.

Air Brakes
George Westinghouse invented air brakes in 1868.

Air Conditioning
Willis Carrier brought us the comfort zone with air conditioning.

Ambulance
The concept of ambulance service started in Europe with the Knights of St. John.

Artificial Heart
Willem Kolff invented both the first artificial heart and the first artificial kidney dialysis machine.

Atomic Bomb
In 1939, Einstein and several other scientists told Roosevelt of efforts in Nazi Germany to build an atomic bomb. It was shortly thereafter that the United States Government began the Manhattan Project, whose research produced the first atomic bomb.

Atomic Clock
The US primary time and frequency standard is a cesium fountain atomic clock developed at the NIST laboratories.

Audio Tape Recording
Marvin Camras invented the method and means of magnetic recording. The history of sound recording.

Automatic Doors
Dee Horton and Lew Hewitt invented the sliding automatic door in 1954

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