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What (who) is massively parallel computers - definition
COMPUTATIONAL CHEMISTRY SOFTWARE PROGRAM
Massively Parallel Quantum Chemistry; MPQC
Massively parallel processor array
INTEGRATED CIRCUIT WHICH HAS A MASSIVELY PARALLEL ARRAY OF HUNDREDS OR THOUSANDS OF CPUS AND RAM MEMORIES
Massively Parallel Processor Array
A massively parallel processor array, also known as a multi purpose processor array (MPPA) is a type of integrated circuit which has a massively parallel array of hundreds or thousands of CPUs and RAM memories. These processors pass work to one another through a reconfigurable interconnect of channels.
Parallel Computers, Inc.
AMERICAN COMPUTER MANUFACTURING COMPANY
Parallel Computers
Parallel Computers, Inc. was an American computer manufacturing company, based in Santa Cruz, California, that made fault-tolerant computer systems based around the Unix operating system and various processors in the Motorola 68000 series.
parallel processor
![A graphical representation of [[Amdahl's law]]. The speedup of a program from parallelization is limited by how much of the program can be parallelized. For example, if 90% of the program can be parallelized, the theoretical maximum speedup using parallel computing would be 10 times no matter how many processors are used.](https://commons.wikimedia.org/wiki/Special:FilePath/AmdahlsLaw.svg?width=200 "A graphical representation of [[Amdahl's law]]. The speedup of a program from parallelization is limited by how much of the program can be parallelized. For example, if 90% of the program can be parallelized, the theoretical maximum speedup using parallel computing would be 10 times no matter how many processors are used.")
![Beowulf cluster]]](https://commons.wikimedia.org/wiki/Special:FilePath/Beowulf.jpg?width=200 "Beowulf cluster]]")
![Blue Gene/L]] massively parallel [[supercomputer]]](https://commons.wikimedia.org/wiki/Special:FilePath/BlueGeneL cabinet.jpg?width=200 "Blue Gene/L]] massively parallel [[supercomputer]]")
![The [[Cray-1]] is a vector processor](https://commons.wikimedia.org/wiki/Special:FilePath/Cray 1 IMG 9126.jpg?width=200 "The [[Cray-1]] is a vector processor")
![A graphical representation of [[Gustafson's law]]](https://commons.wikimedia.org/wiki/Special:FilePath/Gustafson.png?width=200 "A graphical representation of [[Gustafson's law]]")
![[[ILLIAC IV]], "the most infamous of supercomputers"<ref name="infamous"/>](https://commons.wikimedia.org/wiki/Special:FilePath/ILLIAC 4 parallel computer.jpg?width=200 "[[ILLIAC IV]], \"the most infamous of supercomputers\"<ref name=\"infamous\"/>")
![A logical view of a [[non-uniform memory access]] (NUMA) architecture. Processors in one directory can access that directory's memory with less latency than they can access memory in the other directory's memory.](https://commons.wikimedia.org/wiki/Special:FilePath/Numa.svg?width=200 "A logical view of a [[non-uniform memory access]] (NUMA) architecture. Processors in one directory can access that directory's memory with less latency than they can access memory in the other directory's memory.")
![Tesla GPGPU card]]](https://commons.wikimedia.org/wiki/Special:FilePath/NvidiaTesla.jpg?width=200 "Tesla GPGPU card]]")
![Taiwania 3 of [[Taiwan]], a parallel supercomputing device that joined [[COVID-19]] research.](https://commons.wikimedia.org/wiki/Special:FilePath/Taiwania 3 Supercomputer.jpg?width=200 "Taiwania 3 of [[Taiwan]], a parallel supercomputing device that joined [[COVID-19]] research.")
PROGRAMMING PARADIGM IN WHICH MANY CALCULATIONS OR THE EXECUTION OF PROCESSES ARE CARRIED OUT SIMULTANEOUSLY
Parallel computer; Parallel processor; Parallel computation; Parallel programming; Parallel Programming; Parallel computers; Concurrent language; Concurrent event; Computer Parallelism; Parallel machine; Concurrent (programming); Parallel architecture; Parallel Computing; Parallelisation; Parallelization; Parallelized; Multicomputer; Parallelism (computing); Parellel computing; Superword Level Parallelism; Parallel programming language; Message-driven parallel programming; Parallel computer hardware; Parallel program; Parallel code; Parallel language; Parallel processing (computing); Multiple processing elements; Parallel execution units; History of parallel computing; Parallel hardware; Parallel processing computer
<parallel> A computer with more than one {central processing
unit}, used for parallel processing.
(1996-04-23)
Wikipedia
Massively parallel quantum chemistry
Massively Parallel Quantum Chemistry (MPQC) is an ab initio computational chemistry software program. Three features distinguish it from other quantum chemistry programs such as Gaussian and GAMESS: it is open-source, has an object-oriented design, and is created from the beginning as a parallel processing program. It is available in Ubuntu and Debian.
MPQC provides implementations for a number of important methods for calculating electronic structure, including Hartree–Fock, Møller–Plesset perturbation theory (including its explicitly correlated linear R12 versions), and density functional theory.
