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| ROMFILATELIA 181/2004, National Philatelic Museum collection |
| Triumpha TorWerke computer |
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| ROMFILATELIA 182/2004, National Philatelic Museum collection |
| Abacus - first calculating device |
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| ROMFILATELIA 183/2004, Computer history |
| Step Reckoner (1694) of LEIBNITZ (1646-1716) |
