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Also known as | HC-20 |
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Manufacturer | Epson |
Type | Notebook computer |
Release date | July 1982[1][2][3] |
Introductory price | US$795 (today $2430) |
CPU | Two Hitachi 6301 CPUs at 614 kHz |
Memory | 16 KB RAM expandable to 32 KB 32 KB ROM expandable to 64 KB |
Display | 4 lines x 20 characters LCD |
Graphics | 120 × 32-pixel |
Input | Full-transit keyboard |
Power | rechargeable nickel-cadmium batteries |
Dimensions | A4 Sized |
Mass | Approximately 1.6 kg |
The HX-20 (also known as the HC-20) is an early laptop released by Seiko Epson in July 1982. It was the first notebook-sized portable computer,[4][5] occupying roughly the footprint of an A4 notebook while being lightweight enough to hold comfortably with one hand at 1.6 kilograms (3.5 lb) and small enough to fit inside an average briefcase.[6]
Despite praise from journalists for its technical innovations, the computer was not a commercial success outside of Japan. Radio Shack's TRS-80 Model 100 (the American version of a Kyocera notebook), released in 1983, is thus credited as the first commerically successful notebook computer.[7]