_C_ field, 99 _C_ tape, 82-3 _calcis_ (Latin), 18 calculating punch, 47, 51-2, 235 calculator frames, 138 calculator programmed by punch cards, 236 cam, 94-5 cam contact, 91, 94-5 capacitance, 117 capacitor, 117 capacity: counter, 59; selecting, 59 carbon dioxide, 190 card channel, 47, 52 card column, 48 card feed, 48, 91 card punch, 91, 97 card reader, 116, 118 card sorter, 96 card stacker, 48 card station, 47 Carnegie Institution of Washington, 113 carry impulse, 118 cell nucleus, 2-3 census, 43, 53 channel, 47, 52, 170 characteristic of a logarithm, 107 check counter, 105 check-marks, 151 checking, 105, 110, 179, 227 chess game, 117 chestnut blight, 201 chortle, 12 class selector, 59 clearing, 100 codes, 29, 54, 96, 99 coding, 30, 130, 252-3 coding line, 99 column (in a punch card), 45 connective, 148, 158-9 connective grouping, 159 collating, 51, 173 collator, 47, 51, 235 collator counting device, 51, 235 combining information, 15 combining operations, 173 Common, 59-60 comparer, 57-8 comparing, 50, 57-8 complement, 55; _see also_ nines complement, ones complement, tens complement Complex Computer, 129-30 complex numbers, 128-9 computer, 6, 27 Computer 1 and Computer 2, 132, 138 conflicts between statements, 149-50 consequent, 158 constant, 224 constant ratio, 77 constant register, 96, 99 constant switch, 99 Constant Transmitter, 116, 118 consulting a table, 103, 122 convergent, 221 Converter, 115 context, 144 continuous annuities, 88 continuous contingent insurances, 88 continuously running gear, 93 control, 6, 28, 90-1 control brushes, 51-2 control frames, 138-9 Control Instrument Company, 43 control over robot machines, 196-208 control tape, 28 controversy, 197 cosine, 75, 85, 139, 226 cost of mechanical brains, 87, 109, 126, 142, 165, 168 counter, 52, 74, 93-4 counter position, 93 counter wheel, 93, 118 counting, 55 coupling (numbers), 106 cube, 105, 224 Current (input of comparer), 57 cycle, 29, 45 Cycling Unit, 115-6 Cypriote, 13