| Machine | C o m p a n y | Location | Installed |
|---|---|---|---|
| LEO I I / 1 | J. Lyons & Co. Ltd | London | May 1957 |
| LEO I I / 2 | W.D. & H.O. Wills Ltd | Bristol | Sep 1958 |
| LEO I I / 3 | Stewarts & Lloyds Ltd | Corby | Jun 1958 |
| LEO I I / 4 | Ford Motor Co.(parts) | Aveley | Dec 1958 |
| LEO I I / 5 | Leo Computers Ltd | London | Jul 1959 |
| LEO I I / 6 | Ministry of Pensions | Newcastle | Nov 1959 |
| LEO I I / 7 | British Oxygen Co. | Edmonton | Feb 1960 |
| LEO I I / 8 | Standard Motor Co. | Coventry | Jul 1960 |
| LEO I I / 9 | Ilford Limited (films) | Ilford | Nov 1960 |
| LEO I I / 10 | W.D. & H.O. Wills Ltd | Bristol | Apr 1961 |
| LEO I I / 11 | Ford Motor Co. (payroll) | Dagenham | Jan 1961 |