Memory Computer Plc, the Irish systems house quoted on the Unlisted Securities Market since 1982, has paid UKPIr137,500 cash for a 25% stake in Dublin software house Microman Ltd. Formed in April 1987, the privately held company employs 15 people and produces a shop-floor manufacturing system also called Microman. Written in C, the system runs under Unix, MS-DOS and Xenix operating systems and has been sold both in Ireland and the Far East. The company says it plans to sell the system in Britain through its UK subsidiary Memory Computer Systems Ltd based in Finchley, North London. Asked what had happened to Memory Olivetti, a joint venture company announced by Memory and Olivetti last June that was intended to provide systems to Dublin’s newly formed Financial Services Centre (CI No 950), a company spokesman said the Olivetti deal was still on and negotiations were continuing.