Question: What other computer is part of the Mac Pro line besides the Mac Mini and the Mac Pro?

Context paragraphs:
List of Surface accessories: The Microsoft Surface touchscreen Windows personal computers and interactive whiteboards designed and developed by Microsoft.  Since its release in 2012, there have been various Surface accessories over the years.  Most prominently, are the Surface keyboard covers and the Surface Pen, which were both introduced at launch.  While the keyboard covers have all been sold independently of the Surface devices, the initial release of the Surface and Surface Pro had bundle options, which bundled the black Touch Cover.  The Surface Pen has been included with all Surface line and Surface Pro line devices up until the release of the fifth-generation Surface Pro, where Microsoft decided to unbundle the Surface Pen.

Marble Blast Gold: Marble Blast Gold is a 2002 3D platformer game.  It was pre-installed on some Apple Inc. computers like the iMac, iBook, and Mac Mini.  It is also available for Windows operating systems as well as various Linux distributions.  The sequel, "Marble Blast Ultra", was released a few years later for the Xbox 360 platform with new features and improved graphics.  "Marble Blast XP", a version for the Net Jet online game system, has updated graphics and a marble selector.  Marble Blast Gold was also ported over to the Microsoft Xbox through the Xbox Live Arcade service the following year with enhanced graphics.

MorphOS: MorphOS is an AmigaOS-like computer operating system.  It is a mixed proprietary and open source OS produced for the Pegasos PowerPC processor based computer, PowerUP accelerator equipped Amiga computers, and a series of Freescale development boards that use the Genesi firmware, including the EFIKA and mobileGT.  Since MorphOS 2.4, Apple's Mac Mini G4 is supported as well, and with the release of MorphOS 2.5 and MorphOS 2.6 the eMac and PowerMac G4 models are respectively supported.  The release of MorphOS 3.2 added limited support for PowerMac G5.  The core, based on the Quark microkernel, is proprietary, although several libraries and other parts are open source, such as Ambient desktop.

Apple Pro Mouse: The Apple Mouse (formerly Apple Pro Mouse) was introduced in July 2000 at the Macworld Conference & Expo in New York City.  Apple Computer was one of the first companies to ship an optical mouse as the standard input device.  While the industrial design of the Pro Mouse was handled entirely by Apple's in-house designers, some of the hardware has been engineered by Sparkfactor Design.  The Pro Mouse was included with the Power Mac G4 Cube, also introduced at that year's Macworld.  Apple was the first company to use USB mice and keyboards exclusively when they introduced the "hockey-puck" mouse with the original iMac G3 in May 1998.  Like the "hockey-puck" mouse and all future mice Apple would make, the Apple Pro Mouse was a USB mouse with a much shorter cord than its ADB predecessors, its 2-foot cord was designed to plug neatly into one of the two ports of the Apple Pro Keyboard's built-in USB hub.  The Apple Pro Mouse also featured a unique mechanism to allow for 3 click force settings for the required pressure to click the mouse.  The Apple Pro Mouse was originally released on the iMac G3 "Snow."

System G (supercomputer): System G is a cluster supercomputer at Virginia Tech consisting of 324 Apple Mac Pro computers with a total of 2592 processing cores.  It was finished in November 2008 and ranked 279 in that month's edition of TOP500, running at 16.78 teraflops and peaking at 22.94 teraflops.  It now runs at a “sustained (Linpack) performance of 22.8 TFlops”.  It transmits data between nodes over Gigabit Ethernet and 40Gbit/s Infiniband.

Mac Mini: The Mac Mini (marketed and branded with lowercase 'mini' as Mac mini) is a small desktop computer manufactured by Apple Inc. Like earlier mini-ITX PC designs, it is 7.7 in square and 1.4 in tall.  It weighs 2.7 lb .  Before the mid-2011 revision, all models, except the Late 2009 and Mid 2010 server models, came with an internal optical disc drive.  Models before 2010 used an external power supply and were narrower but taller, at 2.0 xx .  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.

Angren–Pap railway line: The Angren–Pap railway line is an electrified railway line in eastern Uzbekistan.  It provides an additional transport line besides the Kamchik road pass, improving the connection between the Fergana Valley with the rest of Uzbekistan.  The total cost of the project was $ .  The line opened on 22 June 2016.  Passenger trains began operating on 1 September 2016.

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.  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.

Power Mac G4: The Power Mac G4 is a series of personal computers designed, manufactured, and sold by Apple Computer, Inc. from 1999 to 2004 as part of the Power Macintosh line.  Built around the PowerPC G4 series of microprocessors, the Power Mac G4 was marketed by Apple as the first "personal supercomputers", reaching speeds of 4 to 20 gigaFLOPS.  This was the first existing Macintosh product to be officially shortened as "Mac", and is the last Mac able to boot into classic Mac OS.

Mini-DVI: The Mini-DVI connector is used on certain Apple computers as a digital alternative to the Mini-VGA connector.  Its size is between the full-sized DVI and the tiny Micro-DVI.  It is found on the 12-inch PowerBook G4 (except the original 12-inch 867 MHz PowerBook G4, it used Mini-VGA), Intel-based iMac, the MacBook Intel-based laptop, the Intel-based Xserve, the 2009 Mac mini, and some late model eMacs.

Supporting paragraphs: Mac Mini Mac Pro
Answer: iMac