You are a software engineer and you get a new assignment from your boss: 

You need to develop a program for a satelite TV contractor who needs 
to keep track of his customers. 

Describe at least five features of the system that you definitely will
implement. For each feature, write one or two sentences that explain 
why the feature is needed. 

Assume that you would like to implement the system so that several crews of 
the contractor can use it simultaneously, at different locations.  
Describe at least three properties of the system that you would like 
to strive for. For each property, write one or two sentences 
to substantiate the necessary of this property. 

In case you have questions:

Examples of "
A feature of a program" some of 
 MS word's main features are: create a new document, 
edit an existing document, formating, etc.  

Examples of "desirable property": some of MS'word's main property that
I would like to strive for are: fast, high quality print out, ...