Brother 821L
Brief History
After the hungarian foreign trade politics perceived that average people needs pocket calculators at affordable prices, from 1977 some japanese models were imported in large volumes. From 1978, Brother Industries’ four-function calculators were on the market, including cheaper ones with VFD tubes and more expensive thin calculators with liquid crystal displays. The Brother 828L-II (1978) and its successor, the 821L (1979) was almost identical, but 821L used Hitachi chip to allow 8 digits, memory register, sign change, square root and percentage functions with automatic power-off feature.
| Manufacturer: | Brother Industries Ltd. (Japan) |
| Mfg. date: | 1979 |
| Size: | 6,5×10,9×0,8 cm |
| Weight (ready for operate): | n.a. |
| Type: | four-function |
| Capacity: | 8 digits (input/display) 8 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | Hitachi HD43337 |
| Registers: | 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) Ffloating-point notation Sqrsquare root |
| Display: | 8+1 digit LCD |
| Power: | 2×LR44 button cell |
Brother 821L
Inside of the 821L
Similar items
