Question: Who designed the Apple A9X and the Apple A8X?

Context articles: Apple A10X
Apple A8X
Apple II series
Apple A5
Apple Monitor II
Apple A9X
Apple Silentype
Apple Watch
Burrell Smith
Apple Pro Mouse

The Apple A10X Fusion is a 64-bit ARM-based system on a chip (SoC) designed by Apple Inc. and manufactured by TSMC.
 It first appeared in the 10.5" iPad Pro and the second-generation 12.9" iPad Pro, which were both announced on June 5, 2017.
 The A10X is a variant of the A10 and Apple claims that it has 30 percent faster CPU performance and 40 percent faster GPU performance than its predecessor, the A9X.
The Apple A8X is a 64-bit ARM-based system on a chip (SoC) designed by Apple Inc. and manufactured by TSMC.
 It first appeared in the iPad Air 2, which was announced on October 16, 2014.
 It is a variant of the A8 inside the iPhone 6 family of smartphones and Apple states that it has 40% more CPU performance and 2.5 times the graphics performance of its predecessor, the Apple A7.
The Apple II series (trademarked with square brackets as "Apple ][" and rendered on later models as "Apple //") is a family of home computers, one of the first highly successful mass-produced text command microcomputer products, designed primarily by Steve Wozniak, manufactured by Apple Computer (now Apple Inc.) and introduced in 1977 with the original Apple II.
 In terms of ease of use, features and expandability, the Apple II was a major technological advancement over its predecessor, the Apple I, a limited-production bare circuit board computer for electronics hobbyists that pioneered many features that made the Apple II a commercial success.
 Introduced at the West Coast Computer Faire on April 16, 1977, the Apple II was among the first successful personal computers; it launched the Apple company into a successful business (and allowed several related companies to start).
 Throughout the years, a number of models were sold, with the most popular model remaining relatively little changed into the 1990s.
 While primarily an 8-bit computer, by mid-run a 16-bit model was introduced.
The Apple A5 is a 32-bit system-on-a-chip designed by Apple Inc. and manufactured by Samsung and is the successor to the Apple A4.
 The A5 commercially debuted with the release of Apple's iPad 2 tablet, and also powers the iPhone 4S, iPod Touch fifth generation, Apple TV third generation, and the iPad mini.
 This is consistent with how Apple debuted the A4 chip: first in the original iPad, followed by the iPhone 4, and then the iPod Touch (fourth generation).
 Apple claims that compared to its predecessor, the A4, the A5 CPU "can do twice the work" and the GPU has "up to nine times the graphics performance".
The Apple Monitor II is a CRT-based green monochrome 12-inch monitor manufactured by Sanyo for Apple Computer; for the Apple II personal computer family.
 Apple did not manufacture the monitor until halfway through the lifespan of the II series.
 The business-line Apple III had its own Apple Monitor III long before.
 Many home users of Apple II computers used their televisions as computer monitors before the Monitor II was released.
 It featured an inner vertical-swiveling frame.
 This allowed users to adjust the viewing angle up or down to suit their taste without the addition of a tilt-and-swivel device.
 The Monitor II was widely adjustable for the time, as it included adjustments for the size and location of the image on the screen.
 These adjustments had a very small influence on the picture, however, much to the dislike of some users.
 The Monitor II was designed for the Apple II+, but was used widely throughout the Apple II product line, most recognizably on the Apple IIe.
The Apple A9X is a 64-bit ARM-based system on a chip (SoC) designed by Apple Inc. It first appeared in the iPad Pro, which was announced on September 9, 2015 and was released on November 11, 2015.
 The A9X has the M9 motion coprocessor embedded in it, a new innovation not seen in previous chip generations.
 It is a variant of the A9 and Apple claims that it has 1.8 times the CPU performance and 2 times the GPU performance of its predecessor, the A8X.
The Apple Silentype is Apple Inc.'s first printer, announced in 1979 and released in March 1980 for US$599, shortly after the Apple II Plus.
 The Silentype's firmware was written by Andy Hertzfeld, who later worked on the Apple Macintosh.
 The Silentype is a thermal printer, which uses a special paper and provides 80-column output.
 It was also compatible with the Apple III.
 The Silentype printer needs its own specially designed interface card, or an Apple III with the built-in Silentype port.
 It is mechanically similar to the 3M Whisper Writer 1000 and identical to Trendcom's Model 200 and the Axonix ThinPrint 80 (the first, thermal version, not the later DMP model), except for the Apple logo in the lower left corner of the front cover, but the internal digital board was completely redesigned by Apple, removing the relatively expensive microprocessor and memory chips, relying on software in the Apple II instead.
 It was succeeded by the Apple Dot Matrix Printer, released in October 1982 for US$699.
Apple Watch (stylized as WATCH) is a line of smartwatches developed, designed, and marketed by Apple Inc. It incorporates fitness tracking and health-oriented capabilities with integration with iOS and other Apple products and services.
 The original generation of the device was available in four variants: Apple Watch Sport, Apple Watch, Apple Watch Hermès, and Apple Watch Edition; each distinguished by different combinations of cases and first- or third-party interchangeable bands.
 Apple Watch relies on a wirelessly connected iPhone to perform many of its default functions such as calling and texting.
 It is compatible with the iPhone 5 or later models running iOS 8.2 or later, through the use of Wi-Fi or Bluetooth.
 Announced by Apple CEO Tim Cook in September 2014, the device was released in April 24, 2015.
 The Apple Watch quickly became the best-selling wearable device with the supply of 4.2 million smartwatches in the second quarter of the 2015 fiscal year.
 The second generation of Apple Watch, released in September 2016, includes two tiers: Apple Watch Series 2 and Apple Watch Series 1, which includes the S1P chip, but is otherwise identical to the original.
 The Series 3 was announced at a presentation at Apple Park on September 12, 2017 and was released on September 22, 2017.
Burrell Carver Smith (born December 16, 1955) is an American engineer who, while working at Apple Computer, designed the motherboard (digital circuit board) for the original Macintosh.
 He was Apple employee #282, and was hired in February 1979, initially as an Apple II service technician.
 He also designed the motherboard for Apple's LaserWriter, and designed a low-cost version of the Apple II that eventually became the Apple IIe, using the same innovative design techniques that he pioneered with the Mac.
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."