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| HP codename, series | Salad, Woodstock |
| Type, Precision, Input mode | Scientific & Business, 10 BCD digits, exponent ±99, Reverse Polish Notation. Except for the tangent function with arguments near pi/2 the calculator exhibits excellent precision! |
| Programmable | No |
| Memory | 10 registers (0-9), not permanent |
| Display | 10 digit 7 segment red LED plus sign |
| Special features | Wide range of functions: Math, Statistics,
Financial, Depreciation |
| Original Pricing, Production | 1.5.1976 ($200) - 1.9.1978 ($175) |
| Batteries | 2x AA or external power supply |
| Dimensions | Length 12.7cm, Width 6.5cm, Height 2.9cm |
| Links | HP-27 Owner's Handbook
(PDF, English, dated Feb 1976) HP-27 Owner's Handbook Addendum (PDF, English) |
| Comment |
| Calculation |
Correct result |
HP-27 Result |
Error |
| 100/18 40/9 5.555555*0.5555555 40/9+50/9000 sqrt(2E6)/1000 exp(0.005) exp(0.999999) exp(1.000001) exp(100)/1E43 ln(1E-6)/10 ln(0.9995)*10000 ln(1.0005)*10000 pow10(0.005) pow10(0.99999) pow10(1.00001)/10 pow10(80.1)/1E80 log10(2E-8) log10(0.9995)*10000 log10(1.0005)*10000 log10(1000100) 2^40 / 1E12 2^1.443 1.000001^1E6 sin(0.01 rad)*1000 sin(1 rad)*10 sin(1.5608 rad)*10 sin(800 rad)*10 tan(0.01 rad)*100 tan(1 rad) tan(1.5708 rad)/1E5 tan(800 rad) asin(0.01)*100,rad asin(0.5)*10,rad asin(0.999),rad asin(0.99999),rad atan(0.01)*1000,rad atan(0.9999)*10,rad atan(1.0001)*10,rad atan(1E4),rad sin(0.01 deg)*10000 sin(50 deg)*10 sin(89.9 deg)*10 sin(5000 deg)*10 tan(0.01 deg)*10000 tan(50 deg) tan(89.99 deg)/1000 tan(5000 deg)*10 asin(0.01 deg)*10 asin(0.5 deg)/10 asin(0.999 deg)/10 asin(0.99999 deg)/10 atan(0.01 deg)*10 atan(0.9999 deg)/10 atan(1.0001 deg)/10 atan(1E4 deg)/10 |
+5.555555555 555555556 +4.444444444 444444444 +3.086419135 802500000 +4.450000000 000000000 +1.414213562 373095049 +1.005012520 859401063 +2.718279110 178575917 +2.718284546 742232836 +2.688117141 816135448 -1.381551055 796427410 -5.001250416 822979193 +4.998750416 510479141 +1.011579454 259898524 +9.999769744 141629304 +1.000023026 116026881 +1.258925411 794167210 -7.698970004 336018805 -2.172015458 642557997 +2.170929722 302082819 +6.000043427 276862670 +1.099511627 776000000 +2.718856483 813477575 +2.718280469 319376884 +9.999833334 166664683 +8.414709848 078965067 +9.999500371 413582332 +8.939696481 970214179 +1.000033334 666720637 +1.557407724 654902231 -2.722418084 073540959 -1.994900160 845839293 +1.000016667 416711313 +5.235987755 982988731 +1.526071239 626163188 +1.566324187 113108692 +9.999666686 665238206 +7.853481608 973649763 +7.854481608 975316429 +1.570696326 795229953 +1.745329243 133368033 +7.660444431 189780352 +9.999984769 132876988 -6.427876096 865393263 +1.745329269 716252907 +1.191753592 594209959 +5.729577893 130590236 -8.390996311 772800118 +5.729673448 571526491 +3.000000000 000000000 +8.743744126 687686209 +8.974376527 084057279 +5.729386976 834859268 +4.499713506 778012245 +4.500286464 574097998 +8.999427042 206779036 |
+5.555555556 +4.444444444 +3.086419136 +4.450000000 +1.414213562 +1.005012521 +2.718279110 +2.718284547 +2.688117142 -1.381551056 -5.001250417 +4.998750417 +1.011579454 +9.999769744 +1.000023026 +1.258925412 -7.698970004 -2.172015459 +2.170929722 +6.000043427 +1.099511628 +2.718856484 +2.718280469 +9.999833335 +8.414709848 +9.999500372 +8.939696482 +1.000033335 +1.557407725 -2.722418161 +1.994900161 +1.000016667 +5.235987756 +1.526071240 +1.566324187 +9.999666687 +7.853481609 +7.854481609 +1.570696327 +1.745329243 +7.660444431 +9.999984769 -6.427876097 +1.745329270 +1.191753593 +5.729511893 -8.390996312 +5.729673449 +3.000000000 +8.743744127 +8.974376527 +5.729386977 +4.499713507 +4.500286465 +8.999427042 |
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1E-9 0 1E-9 0 0 0 77E-9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 |
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