Information: - An IBM Fellow is an appointed position at IBM made by IBMs CEO. Typically only four to nine (eleven in 2014) IBM Fellows are appointed each year, in May or June. It is the highest honor a scientist, engineer, or programmer at IBM can achieve. - The POWER4 is a microprocessor developed by International Business Machines (IBM) that implemented the 64-bit PowerPC and PowerPC AS instruction set architectures. Released in 2001, the POWER4 succeeded the POWER3 and RS64 microprocessors, and was used in RS/6000 and AS/400 computers, ending a separate development of PowerPC microprocessors for the AS/400. The POWER4 was a multicore microprocessor, with two cores on a single die, the first non-embedded microprocessor to do so. POWER4 Chip was first commercially available multiprocessor chip. The original POWER4 had a clock speed of 1.1 and 1.3GHz, while an enhanced version, the POWER4+, reached a clock speed of 1.9GHz. The PowerPC 970 is a derivative of the POWER4. - The POWER5 is a microprocessor developed and fabricated by IBM. It is an improved version of the POWER4. The principal improvements are support for simultaneous multithreading (SMT) and an on-die memory controller. The POWER5 is a dual-core microprocessor, with each core supporting one physical thread and two logical threads, for a total of two physical threads and four logical threads. - A microprocessor is a computer processor which incorporates the functions of a computer's central processing unit (CPU) on a single integrated circuit (IC), or at most a few integrated circuits. The microprocessor is a multipurpose, clock driven, register based, programmable electronic device which accepts digital or binary data as input, processes it according to instructions stored in its memory, and provides results as output. Microprocessors contain both combinational logic and sequential digital logic. Microprocessors operate on numbers and symbols represented in the binary numeral system. - The memory controller is a digital circuit that manages the flow of data going to and from the computer's main memory. A memory controller can be a separate chip or integrated into another chip, such as being placed on the same die or as an integral part of a microprocessor; in the latter case, it is usually called an integrated memory controller (IMC). A memory controller is sometimes also called a memory chip controller (MCC) or a memory controller unit (MCU). - Ravi Arimilli ( born 1963 ) is an IBM Fellow and Chief Architect . Largely responsible for development of the POWER5 , he is one of the most prolific inventors in the world , being awarded 78 patents in 2002 and a further 53 in 2003 . He has won IBM 's Inventor of the Year award each year since 1998 . He has over 474 patents to his name and is currently listed among the top 20 patent holders alive in the United States of America . Arimilli moved with his family to the United States from Andhra Pradesh , India , in 1969 . He studied at Louisiana State University , and joined IBM in 1985 . He is regarded as IBM 's leading expert on symmetric multiprocessing ( SMP ) system structures , cache / memory hierarchies and system bus protocols . After reading the paragraphs above, we are interested in knowing the entity with which 'ravi arimilli' exhibits the relationship of 'occupation'. Find the answer from the choices below. Choices: - clock - computer - engineer - integrated circuit - scientist
engineer