Here are some captioned photos previously posted to G+:
Contains: Apple I; Apple II; Think-a-Tron; Cray 1; PDP-8; Fairlight; Pegasus; Kilburn-Williams tube; History of Computers poster - from 1937 to 1967; some adverts for LEO, IBM 305, DEUCE; LEO delay line; Curta; the Phillips Economics Computer - coloured water, pipes and tanks; Kelvin’s Harmonic Analyser; the 1958 Mechanical Analog Computer; a GRiD; a ZX80; a slide rule.
(This is not the same Harmonic Analyser recently seen in Glasgow, but by the same Lord Kelvin, and perhaps a later model.)