Ing C Olivetti & Co SpA is holding a board meeting tomorrow to examine its financial results for 1995 and review prospects for 1996. Many analysts believe Olivetti will add to the $567m restructuring charge announced for the first half of 1995, making further provisions to cover restructuring at its loss-making personal computer division. The company denied it was in new talks with Compagnie des Machines Bull SA, but it did appear to keep the door open on co-operation, saying that The group Olivetti believes that synergies in the personal computer sector could be found at the European level, but no proposal has been received from Bull.