Alpha Microsystems Ltd has acquired the balance of the shares in Sabre Business Systems Northern Ireland Ltd to make it a wholly-owned subsidiary: its minority interest in the firm stems from its 1991 acquisition of a majority of Dublin-based Sabre Business Systems Ltd; Sabre wrote the Swords wholesale order processing and distribution system for cash-and-carry operators and delivered goods wholesalers; the acquisition will enable Alpha Micro to consolidate development and marketing of Swords, with which it hopes to raise its market share.