| Machine | C o m p a n y | Location | Installed |
|---|---|---|---|
| LEO I I I / 1 | Leo Computers Ltd., Bureau machine |
Hartree House, Queensway, London |
1962-1972 |
| LEO I I I / 2 | Leo Computers Pty. | Johannesburg, SA | 1962-1972 |
| LEO I I I / 3 | Dunlop Rubber Co. Ltd | Birmingham | 1962-1966 |
| LEO I I I / 4 | London Boroughs Joint Computer Committee | Greenwich | 1963-1975 |
| LEO I I I / 5 | CAV Ltd | London | 1963-1971 |
| LEO I I I / 6 | SheIl-Mex & BP Ltd | Hemel Hempstead / Manchester | 1963-1972 |
| LEO I I I / 7 | J. Lyons & Co. Ltd | Elms House, London | 1963-1972 |
| LEO I I I / 8 | Tubemakers Pty. Ltd | Sydney, Australia | 1963-1976 |
| LEO I I I / 9 | HM Customs & Excise | Southend | 1963-1974 |
| LEO I I I / 10 | Board of Trade | Eastcote | 1963-1971 |
| LEO I I I / 11 | Smith & Nephew Ltd | Birmingham | 1963-1970 |
| LEO I I I / 12 | Leo Computers Ltd (experimental 326 machine) |
Minerva Road | 1963-1967 |
| LEO I I I / 13 | BOC Ltd | Manchester | 1964-1975 |
| LEO I I I / 14 | Shell-Mex & BP Ltd | Hemel Hempstead / Manchester | 1964-1972 |
| LEO I I I / 15 | Shell Australia | Melbourne | 1964-1969 |
| LEO I I I / 16 | Kayser Bondor Ltd | Baldock | 1964-1971 |
| LEO I I I / 17 | Manchester Corporation | Manchester | 1963-1975 |
| LEO I I I / 18 | Cerebos Ltd | London | 1964-1978 |
| LEO I I I / 19 | DNS (GPO) then London Boroughs |
Lytham St Annes London |
1964-1966 1967-1974 |
| LEO I I I / 20 | Colonial Mutual Life | Melbourne, Australia | 1964-1973 |
| LEO I I I / 21 | Tote Investors Ltd | London | 1964-1973 |
| LEO I I I / 22 | H. J. Heinz Co. Ltd then Renold Chains |
London Manchester |
1964-1971 1971-1975 |
| LEO I I I / 23 | Dunlop Rubber Co. Ltd then Freemans Ltd |
Birmingham London |
1965-1971 1971-1973 |
| LEO I I I / 24 | Allied Suppliers Ltd then Phoenix Insurance Co. |
London | 1965-1970 1970-1973 |
| LEO I I I / 25 | Inland Revenue | Worthing | 1965-1974 |
| LEO I I I / 26 | NDPS(GPO) | London | 1965-1980 |
| LEO I I I / 27 | Freemans Ltd | London | 1965-1975 |
| LEO I I I / 28 | Coventry Corporation | Coventry | 1965-1972 |
| LEO I I I / 29 | Shell-Mex & BP Ltd | Manchester / Hemel Hempstead |
1965-1975 |
| LEO I I I / 30 | Royal Bank of Scotland | Edinburgh | 1965-1975 |
| LEO I I I / 31 | Shell Mex & BP Ltd | Hemel Hempstead | 1965-1975 |
| LEO I I I / 32 | Colvilles Ltd | Motherwell | 1965-1974 |
| LEO I I I / 33 | Phoenix Assurance Co. | Croydon | 1965-1973 |
| LEO I I I / 34 | NDPS (GPO) | London | 1965-1977 |
| LEO I I I / 35 | South Western Gas Board | Bath | 1965-1973 |
| LEO I I I / 36 | DNS (GPO) | Lytham St Annes | 1966-1975 |
| LEO I I I / 37 | British Insulated Callenders Cables | Prescot | 1965-1972 |
| LEO I I I / 38 | HM Dockyard | Rosyth (originally at Portsmouth) |
1965-1977 |
| LEO I I I / 39 | Ever Ready Co. | London | 1965-1973 |
| LEO I I I / 40 | Consolidated Glass | Germiston, South Africa | 1966-1973 |
| LEO I I I / 41 | NHKG | Czechoslovakia | 1966-1977 |
| LEO I I I / 42 | Renold Chains Ltd | Manchester | 1965-1974 |
| LEO I I I / 43 | HM Dockyard (replaced LEO III/38) |
Portsmouth | 1966-1977 |
| LEO I I I / 44 | NDPS (GPO) | Cardiff & London | 1966-1981 |
| LEO I I I / 45 | Wedd Durlacher Mordaunt | London | 1966-1972 |
| LEO I I I / 46 | J. Lyons & Co. Ltd then NDPS (GPO) |
London | 1966-1972 |
| LEO I I I / 47 | UDZ | Czechoslovakia | 1966-1980 |
| LEO I I I / 48 | HM Dockyards | Devonport | 1966-1977 |
| LEO I I I / 49 | Shell Australia | Melbourne | 1966-1972 |
| LEO I I I / 51 | NDPS (GPO) | Edinburgh & London | 1966-1981 |
| LEO I I I / 55 | NDPS (GPO) | Portsmouth | 1966-1981 |
| LEO I I I / 56 | HM Dockyard | Chatham | 1967-1977 |
| LEO I I I / 58 | NDPS (GPO) | Derby | 1966-1981 |
| LEO I I I / 66 | DNS (GPO) | Glasgow & Bristol | 1969-1977 |
| LEO I I I / 67 | NDPS (GPO) | Derby | 1969-1981 |
| LEO I I I / 68 | DNS (GPO) | Glasgow & Edinburgh | 1969-1981 |
| LEO I I I / 69 | NDPS (GPO) | London | 1969-1981 |
| LEO I I I / 70 | NDPS (GPO) | Bristol | 1969-1981 |
| LEO I I I / 90 | NDPS (GPO) | London | 1964-1965 |
| LEO I I I / 93 | VLD | Czechoslovakia | 1965-1979 |
| LEO I I I / 94 | London Boroughs Management Service Unit | London | 1967-1974 |
/ Last updated: 11 Nov. 2007