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Most network architectures and operating systems still rely solely on relatively simple-minded , identity-based mechanisms to grant access . Our emphasis is on integrating those research strands in different areas into a unified discipline of PSE engineering , abstracting general software architectures and tools from existing approaches and creating new ones . Restoring security and safety in case of crisis : focusing on technologies providing an overview of , and support for diverse emergency management operations ( such as civil protection , humanitarian and rescue tasks ) , and on issues such as inter-organisational preparation , co-ordination and communication , distributed architectures and human factors . The emphasis of the PCA program will be on polymorphous computing architectures and application development environments . Evaluation of Mathematica was done on two different architectures and two different operating systems .