Part 57

“Napier’s bones,” 30

National Library of Medicine, 194

NASA, 149

National Bureau of Standards, 94, 239, 249, 258

National Cash Register Co., The, 240

National Science Foundation, 158, 249

Navigation, use of computer, 182

Navy, U. S., 162

Negation principle, 113, 114

Neuristor, 137

Neurons human, 91, 125, 128, 135 artificial, 136, 138

Newell, Allen, 141, 251

Newton, Isaac, 30

New York University, 194, 220

Nike missile, 119, 157, 191

Nim (game), 8, 143

NORAD, 3, 160, 258

North American Aviation Corp., 65, 185

Numbers cuneiform, 23 Arabic, 23 Babylonian, 23 binary, 55 discrete, 73 Greek, 23 Hindu, 23 pure binary, 102, 104 Roman, 23, 97

Numerical control, 210

Numerical weather prediction, 163

Odyssey, 235

Ohio State University, 222

On-line computers, 81, 205

On-stream computers, 83, 207

On the Origin of Species, 32

Operant reinforcement, 223

Operations research, 36, 155, 256