Hewlett-Packard 65
| Manufacturer: | Hewlett-Packard Corporation (USA) |
| Mfg. date: | 1974-77 |
| Size: | 8,1×15,1×3,5 cm |
| Weight (ready for operate): | 305 g |
| Type: | programmable scientific |
| Capacity: | 10/10+2 digits (input/display) 10/10+2 digits (internal precision) |
| Operating logic: | RPN |
| CPU: | HP 00065-60218 |
| Registers: | 4 standard (with saving the pending operation) 9 memory (with aritmetic) 2 flag |
| Features: | +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Fixfixed-point notation: the listed decimals can be chosen (0-9) Sciscientific (exponential) notation Sqrsquare root x2square pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) DMS-DDconversion of decimal and sexagesimal numbers logexponential and logarithmical functions (10- and e-base) yxraising to power |
| Display: | 15 digit LED (HP) |
| Power: | rechargeable battery pack |
| Programming method: | keystroke-programmable |
| Program capacity: | 100 keystrokes |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.00111811 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.006896579E-70 |
HP 65
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