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In page ZX81:

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By the late 1970s, however, Sinclair Radionics was experiencing serious difficulties.[citation needed] It lost its ability to compete effectively in the calculator market following the launch of a new generation of Japanese-produced calculators with liquid-crystal displays, which were much more capable and power-efficient than Sinclair's LED calculators.[8] Projects to develop a pocket television and digital watch turned out to be expensive failures. The company made losses of more than £350,000 in 1975–76, bringing it to the edge of bankruptcy.[9] In July 1977 Radionics was rescued by a state agency, the National Enterprise Board (NEB), which recapitalised it, provided a loan facility and took effective control of the company by acquiring a 73% stake.[7]