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4. Distributed
computing
solutions
are
more
user- friendly
because
they
utilize
the
PC as the end user interface.
5. Personal
computers and
network
servers are
cheaper than centralized
mainframe
computers.
Information system application can be mapped into 5 layers as said by Whitten [4]:
1. Presentation
layer—the
user
interface
(the
presentation
of
inputs
and
outputs
to
the
user).
2. Presentation
layer
logic—is
any
processing
that
must
be
done
to
generate
the
presentation.
Examples
include editing input data and formatting output data.
3. Application
logic
layer—includes all the logic and processing required supporting
the actual business application and rules. Examples include credit checking,
calculations, data analysis, and the like.
4. Data
manipulation
layer—includes
all
the
commands
and
logic
required
to
store
and retrieve data to and from the database.
5. Data layer—is the actual stored data in business.
2.1.6 Client/Server Architecture
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