HIGH TECHNOLOGY

Unisys Sells $41 Million in Certificates: The Blue Bell, Pa.-based company said the bonds were backed by tax-exempt leases on the computer giant’s equipment. Unisys Corp. and its subsidiaries have sold $550 million in assets so far this year as part of the company’s plan to reduce debt and streamline operations. Among them are the $207-million sale of its Timeplex subsidiary and the $100-million sale of the company’s Detroit office complex. The sale of the certificates backed by the leases, which are similar to bonds, was carried out by a subsidiary, Unisys Financial Corp.