Comparison
 Híradástechnika PTA-4000 (1) |  Sharp PC-1500 | |
| Manufacturer: | Híradástechnika Szövetkezet (Hungary) | Sharp Corporation (Japan) |
| OEM: | Sharp Corporation https://www.watchessales.top/ (Japan) | https://www.bwatches.xyz/ |
| OEM model: | PC-1500 | |
| Mfg. date: | 1983 | 1981-85 |
| Size: | 19,5×8,5×2,5 cm | 19,5×8,5×2,5 cm |
| Weight (ready for operate): | n.a. | |
| CPU: | SHARP LH5801 | SHARP LH5801 |
| RAM: | 3.5 kB SRAM max. 128 kB | 3.5 kB SRAM max. 128 kB |
| ROM: | 16 kB, with the following programs: BASIC | 16 kB, with the following programs: BASIC |
| Programming: | PC-1500 BASIC | PC-1500 BASIC |
| Display: | dot-matrix LCD (156×7) | dot-matrix LCD (156×7) |
| Keyboard: | QWERTY English | QWERTY English |
| Power supply: | 4×AA-type batteries E-09D adaptor | 4×AA-type batteries EA-150 adaptor |