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Texas Instruments
SR-52
1975-77
Texas Instruments
TI-30
1976-83

National Semiconductor 4660

Manufacturer:National Semiconductor Corporation (USA)
Mfg. date:1976
Size:8×15,7×3,2 cm
Weight (ready for operate):216 g
Type:scientific
Capacity:10/10+2 digits (input/display)
12/12+2 digits (internal precision)
Operating logic:algebraic
CPU:National Semiconductor MM5782N (CPU/RAM) + MM5781DUEN (ROM)
Registers:4 standard (with saving the pending operation)
3 memory (with aritmetic)
Features:%calculation with percent +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Ffloating-point notation Fixfixed-point notation: the listed decimals can be chosen (0-9) Sciscientific (exponential) notation Engengineering 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 SDone variable statistics: calculating mean and standard deviation P-Rconverting coordinates between rectangular and polar systems n!factorial
Display:10+2+2 digit LED (NSC NSA5140)
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. 59.9999942989
exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00687733293E-70


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