Comparison
 Texas Instruments SR-50 |  Hewlett-Packard 35 (2) | |
| Manufacturer: | Texas Instruments (USA/Netherland) | Hewlett-Packard Corporation (USA/Singapore) |
| OEM: | https://www.ukomega.cc/ (ismeretlen) | |
| OEM model: | n.a. | |
| Mfg. date: | 1974-75 | 1972-75 |
| Size: | 8×14,7×3 cm | 8×14,5×3,3 cm |
| Weight (ready for operate): | 243 g | 240 g |
| Type: | scientific | scientific |
| Capacity: | 10/10+2 digits (input/display) 13/13+2 digits (internal precision) | 10/10+2 digits (input/display) 10/10+2 digits (internal precision) |
| Operating logic: | algebraic with precedence | RPN |
| CPU: | Texas Instruments TMC0501NL + TMS0521NC | HP 1820-1169 |
| Registers: | 3 standard (with saving the pending operation) 1 memory (with aritmetic) | 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 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) logexponential and logarithmical functions (10- and e-base) yxraising to power n!factorial | +/-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: | 10+2+2 digit LED (Texas Instruments) | 15 digit LED (HP) |
| Power: | BP-1 rechargeable battery pack with AC9200 charger | 3×AA-size NiCd battery pack |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.0000145691 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.006880460815E-70 | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.00102632 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.006896579E-70 |