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The article demonstrates the use of a holistic systems approach (soft systems methodology [SSM]) in the analysis of the cancer care domain to identify whether this creates a system more appropriate to the needs of cancer care teams within the NHS. It describes the current stage of a research project by the Department of Computer Science at Cardiff University in collaboration with Velindre NHS Trust, the South East Wales cancer centre. The aim of the project is to provide information effectively to cancer care teams by creating a system to extend the current cancer network (the Information System for Clinical Organization [ISCO]) to primary care. This extension will provide a communication bridge between primary care and the cancer network. The article gives an overview of the project, followed by a detailed discussion and justification of the holistic approach adopted by the use of SSM, and concludes with a critical evaluation.

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This paper discusses one of the first efforts of developing a sofhuare-based secure communication system that bases security on a combination of hardware and software design features. The paper starts with an overview of the security relevant features of the 80486 architecture and draws a contrast between the protected and real mode environments of the 80486 microprocessor. In particular, protected mode features including segments, descriptor tables, gates, privilege levels and Task State Segments are presented as a prelude to a more detailed discussion of each feature later in the paper. The value of each of these features in the development of a trusted operating environment is explored. This groundwork in place, the paper describes the application of the 80486 features to the development of security sofhvare for the Mercury .