Part 42

Analytical engine, 36, 37

AND gate, 112, 113, 117, 119

Antikythera computer, 25

Apollo computer, 182 space vehicle, 169

Applications, digital computer, 92

A priori concept, 126, 135

APT computer, 209

Aquinas, St. Thomas, 235

Arabic numbers, 23

Archytas, 25

Arithmetic unit, computer, 51, 60

Aristotle, 26

Aristotelian logic, 109

Arizona Journal, 179

Army, U. S., 21, 78, 146, 259

Ars Magna, 28, 29

ARTOC, 157

Artron, 136

Ashby, W. Ross, 51, 124, 128, 251

ASC computer, 155

Associated Press computer system, 177

Asynchronous computer, 255

Athena computer, 52

Atlas missile, 4, 168

Atlas-Centaur missile, 169

Atomic Energy Commission, U. S., 149

Automatic control, 80, 203 pilot, 203

Automation, 26, 80, 173, 181, 201, 202, 203, 211, 217