Carrying bicycles down steps

Central telephone office in the Avenue de l'OpEra, Paris, 1886.

Telephone exchange regenerative repeater, c 1980s.

Henry Perigal, English mathematician, 1897.

Amelia Earhart, US aviator, USA, 5 November 1928.

National Telephone Company directory, 1898-1899.

'Ring Horses', 1898.

Apollo 11astronaut Edwin 'Buzz' Aldrin taking his first step on the Moon, 1969.

Telephone exchange operators, May 1971.

A worker enjoying the sunshine on the steps of the National Gallery

Operating a switchboard, 1951.

Wheeler and Wilson automatic button-hole machine, 1890.