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| CA (An entity entrusted to issue certificates that assert that the recipient individual, computer, or organization requesting the certificate fulfills the conditions of an established policy) | |||
| Portugalski tezaurus | |||
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| Acre; ao cuidado | |||
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AC : 25 do fraz, 6 tematyki |
| Hutnictwo | 1 |
| Komputery | 1 |
| Medycyna | 5 |
| Microsoftu | 14 |
| Nauki o życiu | 1 |
| Przemysł spożywczy | 3 |