National Advisory Committee for Aeronautics, 128, 132 Naval Proving Ground, 177 negation, 24-5, 27, 34-6 negation circuit, 36 negative, 147 negative digit, 215 neon bulb, 119 nerve, 2-4 nerve cell, 2, 3, 16 nerve fiber, 2, 3 nerve networks, 230 nervous system, 188 network analyzers, 242-4 neurosis, 191 nine-pulses, 120-1 nines complement, 95, 121, 223 No X, 59 Northrop Aircraft, Inc., 179 not, 146-8 numeric coding, 13, 54 numerical X position, 45 numerical Y position, 45 occupation code, 54 octal notation, 179, 219 ohm, 117 Ojibwa, 12 ones complement, 217 only, 146-7 operation code, 103 operations with numbers, 24-7 or, 146-9 organization of digital machines, 251 out-code, 99 out-field, 99 output, 6, 90-1, 251-2 output devices, 176, 251-2 output register, 27 paper channel, 52 partial differential equations, 87 partial products, 115, 214 Pearl Assurance Company, 88 pebbles, 17-8 pen with a motor, 180, 195 permanent table frames, 138-9 personal income tax, 141 phonetic writing, 13 phonograph, 15-6 phonographic writing, 13 phototube, 81-2, 183-4 physical equipment for handling information, 11, 15-21, 91 physical problems, 69-72 physical quantities, 67-9 pictographic writing, 12 plugboard, 46, 98 plug-in units, 117-8 point of view, 207 pooh-pooh theory, 12 position (in a punch card), 45 position frames, 138-9 power, 43, 65, 133, 216, 224 prejudice, 205 Previous (input of comparer), 57 Primary (input of sequencer), 61-2 Primary Brushes, 51, 62 Primary Feed, 51, 61 Primary Sequence Brushes, 51 printer, 137 printer frames, 138 problem frames, 138 problem position, 132, 135 problem tape, 134 processor, 132, 134, 175 product, 70, 102, 223 product counter, 102 production scheduling, 193 program, 122, 173, 252-3 program-control switch, 123 program pulse, 122 program-pulse input terminal, 123 program register, 38 program tape, 28-9 program trays, 119 program trunk lines, 119 programming method of von Neumann, 124 pronoun, 223 psychological testing, 190 psychological trainer, 191-2 pulses, 120, 171 punch card, 17, 44-5, 95, 97 punch-card column, 45 punch-card machinery, 17, 20, 42-64, 232-9; cost, 63; reliability, 63-4; speed, 62-3 punch feed, 51-2 punched paper tape, 17, 23, 82, 95 punching channel, 50 punching dies, 48, 51-2 pyramid circuit, 39 quantity of information, 11, 14-15 quartz, 171 quotient, 98, 103