Comparison
 Híradástechnika TK-835 |  EMG HUNOR 86 | |
| Manufacturer: | Híradástechnika Szövetkezet (Hungary) | Elektronikus Mérőkészülékek Gyára (Hungary) |
| OEM: | Bowmar-Ali Inc. (USA) | https://www.prws.me/ |
| OEM model: | MX-140 | |
| Mfg. date: | 1974 | 1976-77 |
| Size: | 7,8×13,2×3,7 cm | 8,5×13,4×3,8 cm |
| Weight (ready for operate): | 262 g | 260 g |
| Price: | HUF 24.000 (HT, MIGÉRT, 1974) | HUF 2.990 (MIGÉRT, 1976) HUF 1.500 (PIÉRT, 1978) |
| Type: | scientific | four-function |
| Capacity: | 10/10+2 digits (input/display) 10/10+2 digits (internal precision) | 8 digits (input/display) 8 digits (internal precision) |
| Operating logic: | algebraic | algebraic |
| CPU: | MOS MCS2525 002 + MCS2526 002 | National Semiconductor MM5738N |
| Registers: | 2 standard (with saving the pending operation) 2 bracket (with saving the pending operation) 1 memory (with aritmetic) | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 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) logexponential and logarithmical functions (10- and e-base) yxraising to power | %calculation with percent Ffloating-point notation |
| Display: | 10+2+2 digit LED (Bowmar Optostic) | 8+1 digit LED (National Semiconductor NSA298) |
| Power: | 6×AA NiCd rechargeable battery (built-in) chargeable with E-69 adaptor | 3R12 type battery (4.5V) |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.063296 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00704092E-70 |