POSIX in Real-TimeIn today's computing systems, it is becoming increasingly important to design software with an open system architecture utilizing industry-adopted standards. The need to develop open systems is driven by three major factors. First, gone are the days when a single developer could implement the entire system from scratch. Software development programs are growing in scale, requiring teams of increasing size. Second, software does not operate in isolation; it must co-exist with the vast amount of commercially available software. Last, the lifecycle of a software application is typically long, requiring numerous modifications and updates as new features are added. An open software architecture addresses the challenges of today's software development process by defining standard software interfaces, which promote interoperability and portability. Openly published standard interfaces also reduce the cost of adding functionality in the future.
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