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20
1. Electromechanical calculator companies
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Calculator companies
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1.1. Friden, Inc.
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Electromechanical calculator companies
1.2. Marchant Calculating Machine Company
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Electromechanical calculator companies
1.3. Olivetti S.p.A.
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Electromechanical calculator companies
2. Electronic calculator companies
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Calculator companies
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2.1. Busicom
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Electronic calculator companies
2.2. Calculated Industries
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Electronic calculator companies
2.3. Canaton
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Electronic calculator companies
2.4. Canon Inc.
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Electronic calculator companies
2.5. Casio
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Electronic calculator companies
2.6. Citizen Watch
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Electronic calculator companies
2.7. Commodore International
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Electronic calculator companies
2.8. Decimo
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Electronic calculator companies
2.9. Heathkit
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Electronic calculator companies
2.10. Hewlett-Packard
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Electronic calculator companies
2.11. Minolta
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Electronic calculator companies
2.12. Monroe Systems for Business
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Electronic calculator companies
2.13. Sharp Corporation
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Electronic calculator companies
2.14. Sinclair Radionics
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Electronic calculator companies
2.15. Texas Instruments
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Electronic calculator companies
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