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In simplest terms, thin client/server-based computing describes
a shift away from the complexities of the typical modern
personal computer (PC)-based network. While the PC started
out as a simple tool which enabled individuals to increase
their personal productivity, it has in fact become a rather
complicated and bloated device. New PC hardware and software
are constantly being released, creating an endless stream
of compatibility issues, both small and large. Just when
you think you have your PCs working perfectly, new applications,
devices, device drivers, Internet access, etc., are required,
and each desktop computer needs to be individually upgraded,
reconfigured, or even completely replaced. As a result,
what started as a simple personal computer evolved into
a rather complex "fat client" network device.
Thin client computing is a response to this constant PC
desktop upgrade and maintenance cycle with its high cost
and high manpower requirements disrupting the flow of business.
A thin client is a "display-only" device, meaning
it displays applications that run on dedicated servers rather
than on the computer.
Many people can relate this approach to the experience
of using an older style "mainframe" terminal.
These are very simple devices— plug them in, log on,
and start working. No one has ever complained about the
reliability, speed, or productivity of using a simple computer
terminal. They tend to be extremely reliable and easy to
maintain, with a very long operational life. The only drawback
has been the lack of a graphical user interface (GUI) and
the inability to run popular MS Windows compatible applications.
This is precisely what a thin client does — provide
all the benefits of centralized computing, ie powerful servers
and simple terminals, with the ability to run modern Windows
applications. While people tend to consider display terminals
to be old-fashioned technology, think of how much simpler
it is to have all applications and data in one place, a
characteristic which allows any number of people to share
them by simply plugging in a terminal.
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