ENVS 1500 Chapter 4: ENVS 1500 Chapter 4 Notes
ENVS 1500 Chapter 4 Notes – Summary
Introduction
The user view of operating systems
• We introduced you to two different views of the role of the operating system as part of
the overall computer architecture.
• Specifically, we looked at the operating system both as a means of delivering services to
the user and as a way of controlling and operating the system facilities.
• In this chapter, we take a closer look at the operating system from the perspective of
service to the user.
• Much of the material in this chapter is at least superficially very familiar to you.
• You have worked closely with at least one type of computer system and quite possibly
with more than one.
• You are familiar with some of the tasks, services, and capabilities that are provided for
you by the system or systems that you have worked with.
• You are familiar with the different types of interfaces that you have used to perform
those tasks and with the commands and the command structure that are built into the
system for you.
• In this chapter we are interested in two aspects of the operating system as it pertains to
the user.
• First, we will consider the services that are provided to the user, and second, we will
consider the medium for delivery of those services, namely, the type and appearance of
the user interface that the system provides.
• You will see the standard tasks that a user interface is expected to perform, various
ways in which those tasks can be implemented
• The advantages and disadvantages of different implementations
• You will be able to observe that the services provided are relatively independent of the
means used to access them.
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