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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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@rorycarlyle we got our Service Desk software to tweet issues! Blog Topic: How do you use Social media on the Help Desk?
brenbt (Bren Boddy-Thomas) Fri, 18 Dec 2009 06:01:51 -0000
@rorycarlyle we got our Service Desk software to tweet issues! Blog Topic: How do you use Social media on the Help Desk?
This is sort of unbelievable: http://bit.ly/7bMNoF Insurgents used mass-market software to view feeds from U.S. Predator drones
sjvenuto (Stephen J. Venuto) Fri, 18 Dec 2009 06:01:03 -0000
This is sort of unbelievable: http://bit.ly/7bMNoF Insurgents used mass-market software to view feeds from U.S. Predator drones
Ok, I spoke too soon. The "select and install software" step is failing hard. #eucalyptus
BluePojo (Josiah Kiehl) Fri, 18 Dec 2009 06:00:22 -0000
Ok, I spoke too soon. The "select and install software" step is failing hard. #eucalyptus
!Another computer error!...Solve it: http://www.regirepair.com/compare-registry-fix-software.php
tweetrepair (Mike Hall) Fri, 18 Dec 2009 06:00:14 -0000
!Another computer error!...Solve it: http://www.regirepair.com/compare-registry-fix-software.php
RT @CloudGraphics: Software asset management intro & survey: http://bit.ly/5BdmU3
ijusth (Ilan Justh) Fri, 18 Dec 2009 06:00:12 -0000
RT @CloudGraphics: Software asset management intro & survey: http://bit.ly/5BdmU3
Latest in Backup and Recovery Software: read more at : http://tecksnippets.blogspot.com
shunmugam1234 (shunmugam M) Fri, 18 Dec 2009 05:58:26 -0000
Latest in Backup and Recovery Software: read more at : http://tecksnippets.blogspot.com

 
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Aantix Options Report - Provides up to the minute probabilities of an option reaching its given strike price.
Meta Description: [ aantix.com ]

Arizona Financial Software - Write, analyze, and track the writing of covered call options.
Meta Description: [ Covered call writing has provided profits over 20% a year and increased cash flow with consistency at less risk than holding a portfolio of common stocks. ]

ATOM - Advanced Tool for Option Modelling - Provides derivative pricing and structuring information. Includes ATOM, an advanced free option pricing tool.
Meta Description: [ Derivative pricing and structuring information. ATOM, an advanced free option pricing software, is available for download. ]

Butler Creek Software, Inc. - Software for the covered call investor that downloads, filters, and sorts potential returns for covered call investments.
Meta Description: [ OptionGrid Covered Call Investing Software ]

Easy Options ESPP Custom - Stock options and employee stock purchase management. Integrated options, ESPP, valuations, insider reporting, and task scheduling.

Essex Trading Company, Ltd. - Developers of the award-winning Option Pro and Futures Pro trading software.
Meta Description: [ Essex Trading Company, Ltd.,is the developer of the award-winning Option Pro and Futures Pro trading software. ]

404 ETS: Real Time Profit and Loss Calculator - Instant tracking for profit and loss calculator when making any type of investment that has continuing expenses and income.
Meta Description: [ ETS Rental Income/Expense Software, for small business.Trial Demo Available ]

Market Pro Software - Tracks paper and real stock and option trades.
Meta Description: [ Stocks, Options, Calculators. At Market Pro we don't force you into a trading system.  We let you trade the way you want. Market Pro just makes it easier and faster to track your stock and option trades and to know your open positions. Easy to use entry forms from Market Pro allow you to ente... ]

Midas Touch - Learn how options are priced: The key parameters, the significance of each, and the impact of changes. Also includes free option trading tips.
Meta Description: [ This Option Pricer determines fair value for options, volatility, profit probability, ROI, Greeks, and analyzes option strategies. ]

Option Crawler Software - Low cost option quoting and strategy building tools for windows.
Meta Description: [ Welcome to option crawler. option crawler shows you the best and latest news about option crawler. We will show you a list of the news found in Google and MSN about option crawler. This list is compiled out of the results given by Google and MSN over a period of time about option crawler. Th... ]

Option Insight - Free software that downloads option quotes and then shows all possible spreads. Sort by various criteria. Each spread also shows a profit-loss graph.
Meta Description: [ First-class software for stock and option traders! ]

Option Internet Freeware - Options valuation and matrix, position chart and management, tutorial, and Internet links.
Meta Description: [ Introduction to Option Internet Freeware ]

Option Money Portfolio Software - Software designed for option traders to track their portfolio and option trades: financial reports, tax reports, account summary, and holding reports.
Meta Description: [ We offer complete investment management software for active stock and option traders, investment professionals, investment advisors, brokers, and accounting firms that need to complement their corporate information. ]

Option Wizard Online - MS Excel based option analytical software. An evaluation offer available.
Meta Description: [ Option Wizard Scan ]

OptionCity.net - Introduces OptionCity Calculator, an option pricing software capable of handling stochastic volatility and stock price jumps.

OptionEdge - Simulate how a change in stock price, time left, and volatility can affect the profitability of your trade. Free demo available.
Meta Description: [ Stock option trading software for Excel. ]

500 OptionMax - Option software which suggest different trading strategies. Also contains free calculators.

Optionomics Corp - Premium risk management and option analysis suite comprised of many tools for a wide range of trading needs. Consulting and historical price data.
Meta Description: [ Option trading, Portfolio Management and Risk Management software for Stocks, Options, Futures, and OTC. Includes historical database and consulting ]

Options Strategy Analysis Tools - Free software tools for option price calculation using the Black-Scholes and binomial models, the analysis of trading strategies using payoff diagrams, and the graphical analysis of Greeks
Meta Description: [ Options trading strategy evaluation software, including Hoadley Derivatives Add-in for Excel for option pricing, historic and implied volatility, probabilities, trading profitability, hedging analysis, and more. ]

Optionstar - Detailed analysis tools including black scholes, volatilities, greeks, price decay, and 1000+ spread generator. Free data.
Meta Description: [ optionstar options analysis software with free data feed ]

OptionVue Systems International Inc - Developers of OptionVue 5, a comprehensive options analysis and trading package designed for option traders of all experience levels. Also includes educational trading articles, seminars, books, and CDs.
Meta Description: [ Successful option traders need a competitive edge when trading options. Since 1982, OptionVue Systems has delivered World-class options trading solutions that give them that edge ]

RealOptions Software, Inc. - Software, and training seminars for senior management and financial professionals in the use of real options.

Robert's Online Financial Applications - A public domain collection of financial applications including derivatives and options calculator, and stock charts.
Meta Description: [ A free public domain collection of financial applications ]

Rocky Point Options Analysis Software - Offers a free web-based browser for options analysis (Win32). Downloads freely-available quotes from the net, and displays data plus derived values (delta, gamma, and theta).
Meta Description: [ Software tools for investors in stock options. ]

Savvysoft - Performance derivatives software. Infinitely customizable, handles all types of derivatives.

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