Trees are a natural resource that is eminently renewable, expandable and flexible. The extent to which society can take advantage of these attributes is governed, in large degree, by technology. Utilization technology, in particular, influences the effective size of the resource--in relation to national requirements. This report describes some of the most recent findings from research, by the Forest Products Laboratory and cooperating universities, aimed at extending U.S. timber supplies. It emphasizes more efficient use of wood in housing, processing of hardwoods and logging-residue-type materials, increased yield from small sawlogs, and protection of wood from decay. It also explains briefly the general programs of the Laboratory and describes technology transfer efforts.