| item | description | category | filter | more on... |
| PTT | Parallel Tasking Technology | Uncategorized |
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| PTT | Partial Thromboplastin Time | Medical/Laboratory |
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| PTT | Partial Thromboplastin Time | Medical/Physiology |
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| PTT | Platform Transmitter Terminal | Edu./Ocean Science |
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| PTT | Post, Telegraph and Telephone | Uncategorized |
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| PTT | Postal Telegraph Telephone | IT/Telecom |
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| PTT | Postal, Telephone and Telegraph Authority | IT/Telecom |
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| PTT | Postal, Telephone, and Telegraph | Governmental/Military |
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| PTT | Presentations That Talk | Business/Firms |
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| PTT | Press To Talk | IT/Telecom |
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| PTT | Public Telephone and Telegraph | Governmental/Military |
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| PTT | Push To Talk | IT/Telecom |
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| PTT | Push-to-Talk | Governmental/NASA |
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