An introduction

<iframe src="http://www.slideshare.net/slideshow/embed_code/8268864" width="427" height="356" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" style="border:1px solid #CCC;border-width:1px 1px 0;margin-bottom:5px" allowfullscreen> </iframe> <div style="margin-bottom:5px"> <strong> <a href="http://www.slideshare.net/MsJMcLeod/introduction-to-a2" title="Introduction to a2" target="_blank">Introduction to a2</a> </strong> from <strong><a href="http://www.slideshare.net/MsJMcLeod" target="_blank">MsJMcLeod</a></strong> </div>