Glossary - S
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Scalar processors
Usual processors working with numbers in the form of individual values. They are fast for common tasks like word-processing, compilation or web browsing, but slower for operations with matrices than vector processors
SMP
Symmetric MultiProcessing - architecture of a multiprocessor machine, where all CPUs are equal and are sharing one copy of operating system. When compared to clusters, it is easier to write applications for SMP machines due to the shared memory and OS, but SMP machines are more expensive for the same number of CPU than clusters
SSH
Secure SHell - A safe variant of telnet
Supercomputer
A computer more powerful than other contemporary computers. The definition is moving over time, so that todays common computers can be more powerful than supercomputers of the past. Todays supercomputers have many CPUs, while todays common computers just one or two.