Boots 325
Brief History
Among the own-brand calculators in the Boots department stores in the U.K., the first scientific model built with liquid crystal display — the 325 —, appeared in 1978. This machine and its four-function counterpart — the 314 — made in Taiwan were the first models not manufactured by Casio. The NEC chip of the otherwise surprisingly high-quality, attractive and elegant calculator may be familiar from the proprietary products of the emerging Taiwanese and Hong Kong manufacturers of the era, distributed mainly for western department and catalog stores, which could be sold at much lower prices than ones from well-known brands. Later, however, Boots returned to its previous practice and ordered its next scientific calculators with LCD display again from Casio.
| Manufacturer: | Boots the Chemists Ltd. (United Kingdom) |
| OEM: | n.a. (Taiwan) |
| OEM model: | n.a. |
| Mfg. date: | 1978 |
| Size: | 7×14,2×0,9 cm |
| Weight (ready for operate): | n.a. |
| Type: | scientific |
| Capacity: | 8/5+2 digits (input/display) 9+2 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | NEC D1851G |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 2 bracket (with saving the pending operation) 1 memory (with aritmetic) |
| 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) 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 n!factorial |
| Display: | 8+1+1 digit LCD (Optrex FRD-012C) |
| Power: | 3×LR44 button cell |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.0154861 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.007363E-70 |
Boots 325
Inside of the 325
Similar items
