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Ronald Spencer
1982
British Telecom documentary about the past and future of telephone exchanges and switches.
7.0• 1971
7.6• 1991
7.6• 1999
7.2• 2022
6.4• 2017
7.8• 2000
6.4• 2026
7.1• 2025
6.5• 2019
7.4• 1977
7.9• 2003
6.2• 2002
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