Comparison
 Aurora CB-900 |  Sharp EL-5809 | |
| Manufacturer: | Aurora Co., Ltd. (Taiwan) | Sharp Corporation (Japan) |
| Mfg. date: | 1983 | 1977 |
| Size: | 15,2×6,5×0,7 cm | 17,8×4,6×0,8 cm |
| Weight (ready for operate): | 81 g | 63 g |
| Type: | four-function | scientific |
| Capacity: | 8 digits (input/display) 8 digits (internal precision) | 8/5+2 digits (input/display) 9/9+2 digits (internal precision) |
| Operating logic: | algebraic | algebraic |
| CPU: | NEC D1833G | SC43300 |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 3 memory (with aritmetic) | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | %calculation with percent +/-change sign (direct entry of negative numbers) AddAdd mode: the last two digit will be the fraction Ffloating-point notation | +/-change sign (direct entry of negative numbers) 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) DMS-DDconversion of decimal and sexagesimal numbers logexponential and logarithmical functions (10- and e-base) yxraising to power n!factorial |
| Display: | 8+1 digit LCD | 8+1 digit LCD |
| Power: | 2×LR41 button cells | 2×LR41 button cells |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.00024571 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00688102E-70 |