Red chip Stone Electronic Technology says a computer firm is interested in taking a stake in its joint venture with United States-based TRW, which has reduced its holding to 10 per cent from 51 per cent. The venture, which was formed to penetrate the mainland's systems-integration market, is one of three successful bidders for the Ministry of Information Industry's US$540 million project to computerise the postal service. A spokesman for Stone said it and TRW welcomed the participation of an 'internationally well-known' computer firm. He said the switch was a result of the venture's moves to cut operational costs in order to secure the project. TRW would continue to be responsible for the project's technology, but Stone would assume management responsibilities. TRW is said to have found margins on the project lower than previously anticipated. As TRW has cut its interest, its name will be dropped from the venture, which is now called Stone System Integration. Stone owns 41 per cent of the venture, with investment firm Rockefeller holding another 8 per cent.