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\begin{document}

In attempting to identify objects focus on stored data and processing
coming from the problem space. Nouns in descriptions are agood examples.

After identifitying objects you need to narrow down to those you will
use in the code. Reasons for inclusion of objects

\begin{itemize}

\item needed history (does systme need to remember states)

\item Needed services 

\item \(>\)1 attribute

\item common attributes or services (-\(>\) classification structure)

\item essential requirements (part of specification)

\end{itemize}

Reasons for exclusion of objects: things that you don't need.

\begin{itemize}

\item unneeded services

\item unneeded history

\item only 1 instance of object

\item derived (mathematically) result

\end{itemize}

\end{document}
