In 1959, the SHARE Operating System was released as an integrated utility for the IBM 704, and later in the 709 and 7090 mainframes, although it was quickly supplanted by IBSYS/IBJOB on the 709, 7090 and 7094.
Pravijo, da je bil za to mojster Alan Turing na zgodnjem Manchester Mark 1 stroju, ki je že vseboval primitivni koncept operacijskega sistema delujočega na načelih univerzalnega Turingovega stroja.