Hewlett-Packard Co yesterday told its international user group in Vienna, Austria that it had begun limited customer shipments of the first beta test units of the HP3000 Series 930 Precision Architecture RISC business computers on schedule, and remains on target for first commercial ships in mid-1987; shipments of the Series 950 are still set for second half 1987; the company says that it is still too early to make performance projections with certainty and that software engineers would continue to tune the operating system during the beta-testing process – and much work remains to be done.