Capital, inventory and labor resources can be managed better and at lower cost using computerized maintenance record keeping, members of the Western Council of Private Fleet Operators were told at a recent luncheon in Los Angeles. Pete Thatcher, regional vice president of Main- stem, gave a slide presentation to the group describing his firm's data-processing program. Computer printouts of maintenance and repair work allow administrators to survey operations at a glance. "A fleet manager with no data doesn't know how to manage," Thatcher said. The system helps administrators spot trends in repairs, which gives them greater control over operations by enabling them to plan for future needs. By eliminating about 80-percent of mepaperwork of manual record-keeping, the system usually more than pays for itself, he added.