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in part by the British Rayon Research Association (BRRA), the project produced several machines in the early to mid-1950s and provided the design basis for the commercially manufactured Hollerith Electronic Computer (HEC) series, an early British production-scale computer line that ran into the late 1950s and evolved into the ICT 1200 series. Booth maintained that the "X" in the name stood for "X-company", referring to an unnamed

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