A distributed system is a collection of independent or autonomous computers linked by a computer network that appear to the users of the system as a single computer. Two aspects (1) Independent or autonomous computers and (2) Single system _ middleware. System architecture: the machines are autonomous; this means they are computers which, in principle, could work independently(Personal OS, CPU, M/Metc.) . The user’s perception: the distributed system is perceived as a single system solving a certain problem (even though, in reality, we have several computers placed in different locations). According to this definition, the Internet as such, is not a distributed system, but an infrastructure on which to implement distributed applications/services (such as the World Wide Web).
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