switching circuits, 155 syllable-writing, 13 syllables, 211 syllogism, 146, 152 symbolic logic, 221-3, 248; _see also_ mathematical logic symbolic writing, 12 synapse, 3 System of Electric Remote-Control Accounting, 250 systems for handling information, 10 table tape, 134 tables (of values), 103, 136, 224 tabular value, 136, 224 tabulator, 47, 52, 119, 235 tallies, 17 tangent, 105, 226 tank (armored), 180, 195 tank (mercury tank), 171, 179 tape-controlled carriage, 236 tape feed, 91, 178-9 tape punch, 91, 97-8, 137 tape reels, 170 tape transmitter, 135, 137 telegraph line, 6, 119 telephone central station, 138 teletype, 17 teletype transmitter, 133, 135 teletypewriter, 130, 137 ten-position relay, 91-3 ten-position switch, 91-2 ten-pulses, 120-1 tens complement, 224 test scoring machine, 236 then, 146-7 thermostat, 187 thinking, 1-5, 10, 97 timed electrical currents, 44 timing contact, 94 tolerances, 67, 105 torque, 73, 86 torque amplifier, 73 trajectories, 69, 114, 141 transfer circuit, 33 transferring, 31, 34, 100, 119, 167 translating, 57 transmitter, 74 triggering control, 183, 186-7 trigonometric tables, 226 trigonometric tangent, 105, 226 truth, 144 truth table, 147, 155, 222 truth value, 26, 58, 105, 147, 222 tuning, 183 turning force, 72 12 position, 45 two-position relay, 21, 91-2; _see also_ relay two-position switch, 91-2 typewriter, 16, 18 typewriter carriage, 53 unattended operation, 174 understanding, 212-3, 231 unemployment, 201-2 Unequal (output of comparer), 57 unit of information, 11, 14-5, 169 United Nations, 203, 208 United States Army Ordnance Department, 113-4 Univac, 250 University of Pennsylvania, 7, 113 unknowns, 141 Upper Brushes, 52 value tape code, 96 value tape feed, 95-6 variables, 84, 223 _vel_ (Latin), 149 verifier, 47-8, 235 vibration, 69 Vocoder, 255 Voder, 254 voltage, 74 Watson Scientific Computing Laboratory, 239 weather control, 189, 255 weather forecasting, 189, 255 wheel (of a counter), 78 white elephant, 73, 114 winch, 73 words for explaining, 209-12 X, 59 X distributor, 59 X Pickup, 59 X punch, 45, 58 X selector, 59 zero, 133, 212 _zh_ (sound), 13, 185 Zuse Computer, 250