| 21. | Billion Investment Holding's subsidiaries are involved in producing and trading in electronic calculators, translators and hand-held games.
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| 22. | When it was introduced in late 1969, it was one of the smallest electronic calculators ever produced commercially.
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| 23. | The number of machines produced increased constantly until the appearance of the electronic calculators in the early 1970s.
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| 24. | Instead, he returned with the new idea to produce electronic calculators, which were just coming on the market.
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| 25. | For the first time, proprietary electronic calculators were provided to CPA candidates for the two new accounting sections.
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| 26. | Critics later pointed to ABC's flaws when arguing that it was actually an electronic calculator, not a computer.
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| 27. | Since hand-held electronic calculators are designed by engineers rather than mathematicians, it became customary that they follow engineers'notation.
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| 28. | They settled in Dallas, Texas, where he was employed as a technician fixing typewriters, electronic calculators and computers.
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| 29. | Curtas were considered the best portable calculators available until they were displaced by electronic calculators in the 1970s.
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| 30. | The popularity of electronic calculators drew the traditional office equipment companies and the semiconductor companies into the market.
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