| H45 Technologies |
 |
 |
| Haicom |
|
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| HandaSolution |
|
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| Handspring (Palm) |
|
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| Handy Key |
|
|
| Hansol – Korea |
|
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| Hansol – USA |
|
|
| Hauppauge |
|
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| Hawking Technologies |
|
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| Hayannara |
|
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| Hayes |
|
|
| Hermstedt GmbH |
|
|
| Hewlett-Packard – USA |
|
|
| High Tech (HIS) |
|
|
| Highpoint |
|
|
| HIS |
|
|
| Hitachi |
|
|
| Hi-Val |
|
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| Holtek |
|
|
| Hoontech |
|
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| Hornet Technologies |
|
|
| Houston Instruments (GEICalgraph) |
|
|
| Howtek |
|
|
| HP – Brazil |
|
|
| HP – USA |
|
|
| Hsin Lin (Vigour) |
|
|
| Hsing Tech |
|
|
| Huawei |
|
|
| Huke |
|
|
| Huntkey |
|
|
| Hyper Data |
|
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| Hyundai |
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|
