\chapter{General Introduction}
This report starts by introducing the teaching machine {\rm oggin} and
then enhancing its teaching function and method by rewriting it as the
{\rm oggin} simulation CAL tool {\rm newogg}.  The report then goes on
to describe the design and implementation of {\rm newogg}.  The last
section of this report is a discussion of the output of {\rm newogg} and
the difference between {\rm oggin} and {\rm newogg}.
\\
\\
\noindent 
The project was to design a CAL tool for {\rm oggin} which is a teaching
aid.  Chapter 2 is a brief introduction to the {\rm oggin} machine.
This chapter was adapted from {\rm An Introduction to the oggin machine}
by {\sc Dr D.Budgen}.  It provides the background knowledge applicable to the
report.
\\
\\
\noindent
A project usually starts from a rough idea, then enters the stage of
implementation and revision, revision and implementation, and finally
results in an useful product. Such a development of a project is
valuable for reference.  The development of producing {\rm newogg},
including its background and the tools used, are discussed in chapter 3.
\\
\\
\noindent
The essential part of a project is what it is designed to be and how the
design is implemented.  This part always contains useful information for
other relevant projects.  The design and implementation of {\rm newogg}
is introduced in chapter 4, including a description of limitations of
the tools used.
\\
\\
\noindent
The value of a product will be reduced if people cannot use it properly
or effectively due to their lack of knowledge of the product.  Chapter 5
explains what {\rm newogg} can produce and how to exploit its output
effectively through narrating a series of output examples.
\\
\\
\noindent
{\rm newogg} is built on the base of {\rm oggin}.  Their differences are
discussed in chapter 6 through the comparison between their structure,
input data, error message and benefits of output.
\\
\\
\noindent
Where the product is available and how to use it is important to the
user.  Chapter 7 is an user guide which describes useful and crucial
information for the user.
\\
\\
\noindent
Chapter 8 concludes the achievement of the project and possible
extensions.  Anyone who is interested in extending {\rm newogg} can
revise it and make it more useful, and this chapter gives some suggestions.