Bbs Pictures What Is A Picture Called When Its Made Up Of Many Other Pictures(picture Included)?

What is a picture called when its made up of many other pictures(picture included)? - bbs pictures

So my brother has a picture on the wall, which was purchased included (photo), and want a similar way to his friend, and he wants to know if there are to do a special program, and what type of image is called . and do in the situation in Photoshop?

If I make the picture confused Heres a picture of your new image that you want a similar to his friend:)
http://www.amazon.com/Kaplan-PSAT-NMSQT-2009-Psat/dp/1419552090/ref=pd_bbs_sr_3?ie=UTF8&s=books&qid=1214973920&sr=8-3
Thank you and sry if ur confused