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SR-35NC
1976
HT
PTK-1072 (3)
1980

Commodore PR-100

Manufacturer:Commodore Business Machines (USA)
Mfg. date:1977-79
Size:8,1×15,2×3,4 cm
Weight (ready for operate):220 g
Type:programmable scientific
Capacity:8/8+2 digits (input/display)
9/9+2 digits (internal precision)
Operating logic:algebraic
CPU:MOS MPS7530 201
Registers:2 standard (with saving the pending operation)
1 constant (with saving the pending operation)
4 bracket (with saving the pending operation)
10 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 (0-7) 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) hyphyperbolic functions (sinh, cosh, tanh and inverses: ar sinh, ar cosh, ar tanh) 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 LRtwo-variable statistics: linear regression nCrprobability calculations P-Rconverting coordinates between rectangular and polar systems n!factorial
Display:8+2+2 digit LED
Power:3×AA NiCd rechargeable battery (built-in)
Programming method:keystroke-programmable
Program capacity:72 keystrokes
Test results:trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.08726889
exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.006559827E-70

The Commodore PR-100

Inside of the PR-100 with the rechargeable batteries

Inside of the PR-100 with the CPU
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