Question: Jim Keller is a microprocessor engineer most well known for his work at AMD and Apple, he was involved in designing which 32-bit package on package (PoP) system-on-a-chip (SoC) designed by Apple Inc. and manufactured by Samsung? 

full_context: Document 1: Apple A5: 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".
Document 2: Jim Keller (engineer): Jim Keller is a microprocessor engineer most well known for his work at AMD and Apple. He was the lead architect of the AMD K8 microarchitecture (including the original Athlon 64) and was involved in designing the Athlon (K7) and Apple A4/A5 processors. He was also the coauthor of the specifications for the x86-64 instruction set and HyperTransport interconnect. From 2012 to 2015, he returned to AMD to work on the AMD K12 and Zen microarchitectures.
Document 3: Hector Ruiz: Hector de Jesus Ruiz Cardenas (born December 25, 1945) is the chairman and CEO of Advanced Nanotechnology Solutions, Inc. and former CEO & executive chairman of semiconductor company Advanced Micro Devices, Inc. (AMD).
Document 4: Athlon 64: The Athlon 64 is an eighth-generation, AMD64-architecture microprocessor produced by AMD, released on September 23, 2003. It is the third processor to bear the name "Athlon", and the immediate successor to the Athlon XP. The second processor (after the Opteron) to implement AMD64 architecture and the first 64-bit processor targeted at the average consumer, it was AMD's primary consumer microprocessor, and competes primarily with Intel's Pentium 4, especially the "Prescott" and "Cedar Mill" core revisions. It is AMD's first K8, eighth-generation processor core for desktop and mobile computers. Despite being natively 64-bit, the AMD64 architecture is backward-compatible with 32-bit x86 instructions. Athlon 64s have been produced for Socket 754, Socket 939, Socket 940 and Socket AM2. The line was succeeded by the dual-core Athlon 64 X2 and Athlon X2 lines.
Document 5: Advanced Micro Devices: Advanced Micro Devices, Inc. (AMD) is an American multinational semiconductor company based in Sunnyvale, California, United States, that develops computer processors and related technologies for business and consumer markets. While initially it manufactured its own processors, the company later outsourced its manufacturing, a practice known as fabless, after GlobalFoundries was spun off in 2009. AMD's main products include microprocessors, motherboard chipsets, embedded processors and graphics processors for servers, workstations and personal computers, and embedded systems applications.
Document 6: Apple A4: The Apple A4 is a 32-bit package on package (PoP) system-on-a-chip (SoC) designed by Apple Inc. and manufactured by Samsung. It combines an ARM Cortex-A8 CPU with a PowerVR GPU, and emphasizes power efficiency. The chip commercially debuted with the release of Apple's iPad tablet; followed shortly by the iPhone 4 smartphone, the iPod Touch (4th generation), and the Apple TV (2nd generation). It was superseded by the Apple A5 processor used in the iPad 2 released the following year, which was then subsequently replaced by the Apple A5X processor in the iPad (3rd generation).
Document 7: Apple A5X: The Apple A5X is a 32-bit system-on-a-chip (SoC) designed by Apple Inc., introduced at the launch of the third generation iPad on March 7, 2012. It is a high performance variant of the Apple A5; Apple claims it has twice the graphics performance of the A5. It was superseded in the iPhone 5 and 5C by the A6 chip and the fourth generation iPad by the A6X chip.
Document 8: Mark Papermaster: Mark Papermaster is the Chief Technology Officer at Advanced Micro Devices. He had been the Senior Vice President of Devices Hardware Engineering at Apple Inc. He replaced Tony Fadell who was responsible for the team that created the iPod. Papermaster worked at IBM from 1982 to 2008. His last position at IBM was as vice president of IBM's blade server division. In 2008, Papermaster's decision to move from IBM to Apple became central to a court case considering the validity and scope of an employee non-compete clause in the technology industry. In August 2010 he stepped down from his position because of issues with Apple's internal politics and corporate culture.
Document 9: Apple A6: The Apple A6 is a 32-bit package on package (PoP) system on a chip (SoC) designed by Apple Inc. that was introduced on September 12, 2012 at the launch of the iPhone 5. Apple states that it is up to twice as fast and has up to twice the graphics power compared with its predecessor, the Apple A5.
Document 10: Apple A9: The Apple A9 is a 64-bit ARM-based system-on-chip (SoC), designed by Apple Inc. Manufactured for Apple by both TSMC and Samsung, it first appeared in the iPhone 6S and 6S Plus which were introduced on September 9, 2015. Apple stated that it had 70% more CPU performance and 90% more graphics performance compared to its predecessor, the Apple A8, and was one of the most powerful and energy-efficient mobile chips on the market then along with the Samsung Exynos 8890 and Qualcomm Snapdragon 820.
Document 11: Apple A6X: The Apple A6X is a 32-bit system-on-a-chip (SoC) designed by Apple Inc., introduced at the launch of the fourth generation iPad on October 23, 2012. It is a high-performance variant of the Apple A6. Apple claims the A6X has twice the CPU performance and up to twice the graphics performance of its predecessor, the Apple A5X.
Document 12: Apple A10: The Apple A10 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 iPhone 7 and 7 Plus which were introduced on September 7, 2016. The A10 is the first Apple-designed quad-core SoC, with two high-performance cores and two energy-efficient cores. Apple states that it has 40% greater CPU performance and 50% greater graphics performance compared to its predecessor, the Apple A9.
Document 13: Ruchir Puri: Ruchir Puri is the chief architect of IBM Watson, responsible for developing and deploying Watson platform architecture across the range of Watson offerings. He is an IBM Fellow at IBM Thomas J Watson Research Center, Yorktown Heights, New York. In the past, Ruchir has led the Deep Learning and Machine Learning Platform Initiative at IBM Research to advance IBM’s cognitive cloud platform vision and also led IBM's efforts in software-hardware acceleration for cognitive and analytic workloads and driven strategy for differentiated cognitive computing infrastructure. Puri has received numerous accolades including the highest technical position at IBM, the IBM Fellow, which was awarded for his transformational role in microprocessor design methodology. In addition, Puri has received “Best of IBM” awards in both 2011 and 2012 and IBM Corporate Award from IBM’s CEO, and several IBM Outstanding Technical Achievement awards. Puri is a Fellow of the IEEE, a member of IBM Academy of Technology and IBM Master Inventor, an ACM Distinguished Speaker and IEEE Distinguished Lecturer. He is a recipient of SRC's outstanding mentor award and has been a visiting faculty member at the Dept. of Computer Science, Stanford University, CA, and an adjunct professor at the Dept. of Electrical Engineering, Columbia University, NY and was also honored with John Von-Neumann Chair at Institute of Discrete Mathematics at Bonn University, Germany. Ruchir received the 2014 Asian American Engineer of the Year Award. He has delivered numerous keynotes and invited talks at major software and hardware conferences, National Science Foundation and US Department of Defense Research panels and has been an editor of IEEE Transactions on Circuits and Systems. Puri is an inventor of over 50 United States patents (both issued and pending) and has authored over 100 publications as well as authored a book on Analyzing Analytics. Ruchir is very passionate about technology among school children and has been evangelizing fun with electronics and FIRST LEGO LEAGUE Robotics in community schools.
Document 14: List of AMD K5 microprocessors: The AMD K5 microprocessor is a Pentium-class 32-bit CPU manufactured by American company Advanced Micro Devices (AMD), and targeted at the consumer market. It was the first x86 processor designed by AMD from the ground up, and not licensed or reverse-engineered as previous generations of x86 processors produced by AMD.
Document 15: Intel: Intel Corporation (also known as Intel, stylized as intel) is an American multinational corporation and technology company headquartered in Santa Clara, California (colloquially referred to as "Silicon Valley") that was founded by Gordon Moore (of Moore's law fame) and Robert Noyce. It is the world's second largest and second highest valued semiconductor chip makers based on revenue after being overtaken by Samsung, and is the inventor of the x86 series of microprocessors, the processors found in most personal computers (PCs). Intel supplies processors for computer system manufacturers such as Apple, Lenovo, HP, and Dell. Intel also manufactures motherboard chipsets, network interface controllers and integrated circuits, flash memory, graphics chips, embedded processors and other devices related to communications and computing.
ground_truth: Apple A4