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Computer software (or simply software) is the programs and procedures that enable a computer to perform a specific task, as opposed to the physical components of the system (hardware). This includes application software such as a word processor, which enables a user to perform a task, and system software such as an operating system, which enables other software to run properly, by interfacing with hardware and with other software.

The term "software" was first used in this sense by John W. Tukey in 1957. In computer science and software engineering, computer software is all information processed by computer systems, programs and data. The concept of reading different sequences of instructions into the memory of a device to control computations was invented by Charles Babbage as part of his difference engine. The theory that is the basis for most modern software was first proposed by Alan Turing in his 1935 essay Computable numbers with an application to the Entscheidungsproblem. Hally, Mike (2005:79). Electronic brains/Stories from the dawn of the computer age. British Broadcasting Corporation and Granta Books, London. ISBN 1-86-207663-4.

Relationship to hardware


Computer software is so called in contrast to computer hardware, which encompasses the physical interconnections and devices required to store and execute (or run) the software. In computers, software is loaded into RAM and executed in the central processing unit. At the lowest level, software consists of a machine language specific to an individual processor. A machine language consists of groups of binary values signifying processor instructions (object code), which change the state of the computer from its preceding state. Software is an ordered sequence of instructions for changing the state of the computer hardware in a particular sequence. It is generally written in high-level programming languages that are easier and more efficient for humans to use (closer to natural language) than machine language. High-level languages are compiled or interpreted into machine language object code. Software may also be written in an assembly language, essentially, a mnemonic representation of a machine language using a natural language alphabet. Assembly language must be assembled into object code via an assembler.

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#SMR2009 is being sponsored by @Depiction http://bit.ly/Depiction mapping and simulation software. Thanks @Depiction!
piosmtraining (PIOSMTraining) Wed, 16 Dec 2009 23:45:08 -0000
#SMR2009 is being sponsored by @Depiction http://bit.ly/Depiction mapping and simulation software. Thanks @Depiction!
Visualize magnetic fields: electromagnetic finite element modelling, analysis, simulation software. Animations.... http://ff.im/d0Ekf
AndrewKovalev (AndrewKovalev) Wed, 16 Dec 2009 19:46:54 -0000
Visualize magnetic fields: electromagnetic finite element modelling, analysis, simulation software. Animations.... http://ff.im/d0Ekf
Yenka Science Simulation Software http://ff.im/d0dYF
AndrewKovalev (AndrewKovalev) Wed, 16 Dec 2009 17:07:01 -0000
Yenka Science Simulation Software http://ff.im/d0dYF
Yenka Science Simulation Software http://ff.im/d0cP2
AndrewKovalev (AndrewKovalev) Wed, 16 Dec 2009 17:00:43 -0000
Yenka Science Simulation Software http://ff.im/d0cP2
is looking for software and simulation engineers.
jshanbaum (Joe Shanbaum) Wed, 16 Dec 2009 14:45:47 -0000
is looking for software and simulation engineers.
Arbeit an einer Case Study über den Einsatz einer Software für die Simulation von Gießprozessen.
hartmut_giesen (hartmut_giesen) Wed, 16 Dec 2009 10:02:03 -0000
Arbeit an einer Case Study über den Einsatz einer Software für die Simulation von Gießprozessen.

 
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404 BlochLib - fast C++ quantum and classical NMR simulation tool kit

DASHA - is an program designed to investigate dynamics of biomolecules, for which data of N-15 or C-13 heteronuclear relaxation are available.

MEXICO - MEXICO and MEX are programs to calculate the lineshapes of exchanging systems with and without scalar coupling.
Meta Description: [ Web page for chemistry professor Alex Bain, NMR specialist ]

QSim and HME - QSim has a graphically user interface for design of pulse sequences, simulation and processing. QSim is easy to use but still flexible enough for more advanced users. HME is the simulation part of QSim and is distributed as a set of C++ classes. HME is even more flexible than QSim, but requires programming skills to be used efficiently.

Software Developed at Virginia Tech - Some nice software for teaching NMR, for the PC.

SOLIDS simulation program - Solid-state NMR simulation,version 2.2.13, 1998. A FORTRAN program to simulate SS NMR spectra.
Meta Description: [ Homepage Klaus Eichele ]

500 SpinWorks - Processing and simulation package for Win95/98/NT

The Moyna Group NMR Software Site - A tool for the analysis of shaped pulse frequency excitation profiles.

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