Hitachi Ltd has been talking for a couple of years now about the mainframe it is developing around Hewlett-Packard Co’s Precision Architecture RISC, and the assumption up to now has been that the machine would simply be a big Unix box that would offer performance in the mainframe class. Not so, it appears: reports from Tokyo suggest that the company’s plans are much more ambitious and that it is thinking in terms of a parallel machine that will be compatible with its existing mainframes, and able to run applications developed for both its own VOS 3 and IBM Corp’s MVS operating systems. Introduction is expected early next year.