What other computer is part of the Mac Pro line besides the Mac Mini and the Mac Pro?
Mac Mini:  The Mac Mini is one of three desktop computers in the current Macintosh lineup, along with the iMac and Mac Pro, although it uses many components usually featured in laptops to achieve its small size. Mac Pro: The Mac Pro line is a series of Intel Xeon–based workstation and server computers manufactured by Apple Inc. The Mac Pro, in most configurations and in terms of speed and performance, is the most powerful computer that Apple offers. Mac Pro:  It is the high-end model of the three desktop computers in the current Mac lineup, the other two being the iMac and Mac Mini.
iMac