OUTLINING its future strategy, Hitachi Data Systems has underscored its commitment to meeting the requirements of System 390 users and the growing open systems community. In the System 390 market, HDS is defining new product directions for three distinct processor platforms. These include a ''next generation'' high-speed system, an intermediate CMOS system and a parallel CMOS system. In the open systems arena, HDS provides directions for an expanded Osiris suite of vendor-neutral, standards-based products. Osiris is the HDS open systems client/server computing platform. ''These directions provide solutions for users who need to access information directly and transparently, regardless of its location in the enterprise,'' said Geoff Kennedy, Hong Kong manager. ''Software investments will be protected while customers will be able to migrate complex applications to parallel platforms an at orderly rate.''