| item | description | category | filter | more on... |
| HEC | Harken Energy Corporation | Business/General |
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| HEC | Header Error Checksum | IT/Networking |
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| HEC | Header Error Control | IT/Telecom |
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| HEC | Header Error Control | Uncategorized |
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| HEC | Herolchi Electronic Co | Business/Firms |
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| HEC | High End Computer | IT/General |
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| HEC | Higher Education Commission | Other/States-Local |
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