1. More than 200 British Bombes were built under the supervision of chief engineer Harold Keen of the British Tabulating Machine Company.

2. But the Hollerith tabulating machine (minus a key part, which had to borrowed from the Indian State Railways in Bombay) arrived safely in Colombo.

3. The Hollerith Punch Card, Tabulating Machine and Sorter compiles the results of the 1890 census, in 2 1⁄2 years, rather than the usual 10 year period.

4. 1853 To produce a set of astronomical tables, the Dudley Observatory in Albany, New York buys the first tabulating machine built by Swedes George Scheutz and his son Edvard.

5. The engineering and construction of the original Bombes was the work of the British Tabulating Machine Company – BTM (which was later responsible for the 1950s HEC computer now at TNMOC)