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At the Somerset design facility in Austin, Texas, engineers from each of the three companies: Apple computer Inc., International Business Machines Corp., and Motorola Inc. have designed PowerPC micro-processors, employing a formal design methodology drawn from the best of IBM's and Motorola's development environments. With designs completed on schedule for the first two PowerPC family members, the PowerPC 601 and PowerPC 603 microprocessors-the computing industry can expect a steady stream of PowerPC microprocessors satisfying a broad range of market requirements to be introduced in the years to come. The PowerPC architects paid particular attention to defining PowerPC Architecture details, making it flexible and scalable, thus providing plenty of room for growth across a varied family of processors suitable for a wide range of designs from high-performance, multiprocessing systems to handheld computing devices. In addition, the definition of the architecture ensures a guaranteed common software environment for operating system and applications software developers.