Invention and Engineering

British Rail Class 21 (NBL)

The British Rail Class 21 was a type of Type 2 diesel-electric locomotive built by the North British Locomotive Company in Glasgow for British Rail in 1958–1960. They were numbered D6100-D6157. Thirty-eight of the locomotives were withdrawn by August 1968; the rest were rebuilt with bigger engines to become Class 29, although those locos only lasted until 1971.

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See also

• ▸History of computing hardware
• ▸Dicypellium
• ▸Flash memory

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