ENVS 1500 Lecture Notes - Lecture 14: Web Server, Computer Hardware, Database Server

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ENVS 1500 Lecture 14 Notes Efficient Manner
Introduction
In a way that allows the user access to the computer in a productive, timely, and
efficient manner.
In other words, the operating system acts as an intermediary between the user and the
uses pogas ad the hadae of the opute.
It akes the esoues aailale to the use ad the uses pogas i a oeiet
way, on the one hand
Controls and manages the hardware, on the other.
Intuitively we think of a user as a human interacting with a computer system
Hoee, thee ae situatios i hih the use is atually aothe opute o a
mechanical or electronic device of some sort.
A common example of this situation is one in which an application program on one
computer requests services from an application program or system service on another
machine
For example a Web server application requesting data from a back-end database server.
Another example would be a situation in which a user on a client machine requests file
or printer services on a server machine.
In serving as an intermediary between the users of computer services and the
oputes esoues, the opeatig syste poides thee basic types of services
It aepts ad poesses oads ad euests fo the use ad the uses pogas
and presents appropriate output results.
It manages, loads, and executes programs.
It manages the hardware resources of the computer, including the interfaces to
networks and other external parts of the system.
The relationship between the various components of a computer system is shown
schematically
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