Keystone Atlas-Rand 240
| Manufacturer: | Berkey-Keystone () |
| Mfg. date: | 1974 |
| Size: | 8,2×13,4×4,5 cm |
| Weight (ready for operate): | 291 g |
| Type: | four-function |
| Capacity: | 8 digits (input/display) 8 digits (internal precision) |
| Operating logic: | |
| CPU: | Rockwell A4132PA |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) |
| Features: | %calculation with percent AddAdd mode: the last two digit will be the fraction Ffloating-point notation Fixfixed-point notation: the listed decimals can be chosen (2) |
| Display: | 9 digit (Burroughs Panaplex II) |
| Power: | 4×AA elem Model 375 adapter |
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