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Author Moon, David A. ♦ Sinclair, Kenneth H.
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Language English
Abstract We consider here the importance of an overall systems viewpoint in avoiding computer-related risks. According to Webster's, a system is a regularly interacting or interdependent group of items forming a unified whole. In computer systems, one person's components may be another person's system, and one person's system may in turn be one of another person's components. That is, each layer of abstraction may have it own concept of a system. We speak of a memory system, a multiprocessor system, a distributed system, a multisystem system, a networked system, and so on. A system design can most effectively be considered as a unified whole when it is possible to analyze the interdependent subsystems individually and then to evaluate, reason about, and test the behavior of the entire system based on the interactions among the subsystems. This is particularly true of distributed systems that mask the presence of distributed storage, processing, and control. At each layer of abstraction, it is desirable to design (sub)systems that are context-free, but in reality there may be subtle interactions that must be accommodated—particularly those involving the operating environment.
Description Affiliation: Object Design, Inc., Burlington, MA (Sinclair, Kenneth H.) || Apple Computer, Cambridge, MA (Moon, David A.)
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2005-08-01
Publisher Place New York
Journal Communications of the ACM (CACM)
Volume Number 34
Issue Number 9
Page Count 8
Starting Page 40
Ending Page 47


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Source: ACM Digital Library