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Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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Class 708 | ELECTRICAL COMPUTERS: ARITHMETIC PROCESSING AND CALCULATING |
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1 | ELECTRICAL HYBRID CALCULATING COMPUTER |
100 | ELECTRICAL DIGITAL CALCULATING COMPUTER |
101 | Pulse repetition rate |
104 | Plural complete computers |
105 | Combined with diverse art device |
106 | Checkbook |
107 | Writing instrument (e.g., pen) |
108 | Tape recorder |
109 | Communication device (e.g., telephone, radio, television) |
110 | Business device (e.g., billing, memorandum) |
111 | Horological device |
130 | Programmable calculator |
131 | Having specialized input |
132 | Having supplemental environment related input |
135 | For security |
136 | Input verification |
137 | Fraction input |
138 | Flexible input |
139 | Including specific computing system interconnection |
140 | Modular or overlay nonkeyboard-type information entry |
141 | Including specific nonkeyboard-type information entry |
142 | Including specific keyboard-type information entry |
160 | Having specialized output |
161 | Having supplemental environment related output |
164 | Output verification |
165 | Blanking |
167 | Prompting |
168 | Selective output |
169 | Sequential output |
170 | Using particular format |
171 | Symbol accompanying output |
172 | Audio |
173 | Printer |
174 | Multiple simultaneous outputs |
190 | Integrated circuit |
191 | Electro-optical |
192 | Bubble-domain |
200 | Particular function performed |
201 | Absolute value or magnitude |
202 | Median |
203 | Compression/decompression |
204 | Format conversion |
206 | Unit conversion |
207 | Maximum/minimum determination |
208 | Scaling |
209 | Shifting |
210 | Determining number of like-valued bits in word |
211 | Determining number of like-valued leading or trailing bits |
212 | Detecting particular sequence of bits |
230 | Multifunctional |
231 | Microprocessor |
232 | Array of elements (e.g., AND/OR array, etc.) |
233 | Pipeline |
234 | Parallel bit input of operand |
235 | Uses look-up table |
236 | More than two operands |
250 | Random number generation |
251 | Oscillator controlled |
252 | Linear feedback shift register |
253 | Plural parallel outputs bits |
254 | Seed value controls |
255 | Truly random number |
256 | Plural parallel outputs |
270 | Function generation |
271 | Direct digital frequency synthesizer |
272 | Memory used to store waveshape |
273 | Counter as source (i.e., input) |
274 | Linear |
275 | Circular |
276 | Trigonometric |
277 | Logarithmic/exponential |
290 | Interpolation/extrapolation |
300 | Filtering |
301 | Tapped delay line |
303 | Microprocessor |
304 | Nonlinear (e.g., median, etc.) |
305 | Initialization |
306 | Finite arithmetic effect |
307 | Delta/differential coded |
308 | Multidimensional data |
309 | Frequency measurement |
310 | Coherent |
311 | Frequency detection |
313 | Decimation/interpolation |
314 | Matched filter type |
315 | By convolution |
316 | Having multiplexing |
317 | Wave |
318 | Lattice |
319 | Transversal |
320 | Recursive |
321 | Nontime domain |
322 | Adaptive |
400 | Transform |
401 | Multidimensional |
402 | Discrete Cosine Transform (i.e., DCT) |
403 | Fourier |
404 | Fast Fourier Transform (i.e., FFT) |
405 | Discrete Fourier Transform (i.e., DFT) |
406 | Pipeline |
407 | Systolic |
408 | Radix greater than two |
409 | Butterfly circuit |
410 | Walsh |
420 | Convolution |
422 | Correlation |
440 | Evaluation of trigonometric function |
442 | Coordinate conversion |
443 | Differentiation |
444 | Integration |
445 | Averaging |
446 | Solving equation |
490 | Arithmetical operation |
491 | Residue number |
492 | Galois field |
493 | Multi-valued |
494 | Incremental mode |
495 | Floating point |
496 | Compensation for finite word length |
500 | Evaluation of root |
501 | Multiplication followed by addition |
502 | Reciprocal |
503 | Multiplication |
504 | Division |
505 | Addition or subtraction |
506 | Feedback |
507 | Parallel |
508 | Pipeline |
509 | Systolic |
510 | Microprocessor |
511 | Complex number format |
512 | Logarithmic format |
513 | Variable length or precision |
514 | Matrix array |
517 | Logarithmic format |
518 | Variable length |
519 | Negative radix |
520 | Matrix array |
521 | Pipeline |
522 | Systolic |
523 | Multiplication followed by addition (i.e., x*y+z) |
524 | Multiple parallel operations |
525 | Status condition/flag generation or use |
530 | Error detection or correction |
540 | Cathode-ray tube |
541 | Contact-making device |
542 | Radix point control |
550 | Compensation for finite word length |
603 | Sum of products generation |
604 | All four basic functions |
605 | Evaluation of root |
606 | Evaluation of powers |
607 | Multiplication of matrices |
620 | Multiplication |
650 | Division |
670 | Addition/subtraction |
671 | Comparison |
672 | Incrementation/decrementation |
673 | Radix correction |
675 | Signal amplitude |
676 | Microwave |
677 | Cryogenic |
678 | By electronic tube |
679 | Magnetic |
680 | Decimal |
683 | Coded decimal |
700 | Binary |
800 | ELECTRICAL ANALOG CALCULATING COMPUTER |
801 | Particular function performed |
802 | Evaluation of equation |
805 | Averaging |
806 | Variance or standard deviation determination |
807 | Evaluation of root (e.g., square root) |
808 | Evaluation of powers |
809 | Coordinate conversion or vector resolver |
811 | Evaluation of trigonometric function |
813 | Correlation or convolution |
814 | Of multidimensional data |
815 | Acoustic |
816 | Optical |
817 | Magnetic or electromagnetic |
818 | Having tapped delay line |
819 | Filtering |
820 | Transform |
822 | Differentiation |
823 | Integrator |
824 | Plural integration |
825 | Plural mode (e.g., plural scale) |
826 | Reset |
827 | Drift correction |
828 | Having simultaneous calculation of another function |
829 | Having a voltage to frequency converter |
830 | Electromechanical |
831 | Electro-optical |
832 | Magnetic or electromagnetic |
833 | Amplifier with additional feedback loop |
835 | Multiplication |
836 | Time division |
837 | Quarter-square |
838 | Having charging or discharging of energy storage device |
839 | Photomultiplier |
840 | Electromagnetic |
842 | Electromechanical (e.g., servo-multiplier) |
843 | With alternative division |
844 | Division |
845 | Function generation |
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