 A 41-year-old FX-502P in working condition | |
| Type | Programmable scientific |
|---|---|
| Manufacturer | Casio |
| Introduced | 1978 |
| Calculator | |
| Entry mode | Infix |
| Precision | 12 digits mantissa, ±99 exponent |
| Display type | LCD seven-segment display |
| Display size | 10 + 3 Digits |
| Programming | |
| Programming language(s) | Keystroke (fully merged, Turing complete) |
| Memory register | 11 (FX-501P), 22 (FX-502P) |
| Program steps | 128 (FX-501P), 256 (FX-502P) |
| Interfaces | |
| Ports | one vendor specific |
| Connects to | Compact Cassette via: |
| Other | |
| Power supply | 2×"G13" or 2×"LR44" |
| Power consumption | 0.0008 W |
| Weight | 141 g, 5 oz |
| Dimensions | 15.24×7.6×1.2 cm, 6"×3"×½" |
The FX-501P and FX-502P were programmable calculators, manufactured by Casio from 1978/1979.[citation needed] They were the predecessors of the FX-601P and FX-602P.
It is likely that the FX-501P/502P were the first LCD programmable calculators to be produced as up until 1979 (and the introduction of the HP-41C) no manufacturer had introduced such a device.