National Semiconductor 4520 Scientist
| Manufacturer: | National Semiconductor Corporation (USA/Hong-Kong) |
| Mfg. date: | 1975-76 |
| Size: | 7,4×15,5×2,6 cm |
| Weight (ready for operate): | 190 g |
| Type: | scientific |
| Capacity: | 8/8+2 digits (input/display) 8/8+2 digits (internal precision) |
| Operating logic: | RPN |
| CPU: | NSC MM5758N |
| Registers: | 4 standard 1 memory (without arithmetic) |
| Features: | +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Ffloating-point notation Sciscientific (exponential) notation Sqrsquare root pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) logexponential and logarithmical functions (10- and e-base) yxraising to power |
| Display: | 8+2+2 digit LED (NSC NSA5101) |
| Power: | 3×AA NiCd rechargeable battery (built-in) |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. - exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 2.805433E-70 |
4520 Scientist
Inside of the 4520
Inside of the 4520
4520 Scientist with all accessories
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