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# Software
Software (SW) are programs that run on a computer, i.e. its non-physical parts (as opposed to [hardware](hw.md)); for example an [operating system](os.md), the internet [browser](browser.md) etc. Software is created by [programming](programming.md).
Software (SW) are [programs](program.md) that run on a [computer](computer.md), i.e. its non-physical parts (as opposed to [hardware](hw.md)); for example an [operating system](os.md), the Internet [browser](browser.md), [games](game.md) etc. Software is created by the act of [programming](programming.md) (and related activities such as [software engineering](sw_engineering.md) etc.).
Usually we can pretty clearly say what is software and what is hardware, but there are cases where it's debatable. Normally software is that about the computer which *can relatively easily be changed* (i.e. reinstalled by a typing a few commands or clicking a few buttons) while hardware is *hard-wired*, difficult to modify, and not expected or designed to be modified. Nevertheless e.g. some [firmware](firmware.md) is kind of software in form of instructions which is however many times installed in some special kind of memory that's difficult to reprogram and not expected to be reprogrammed often -- some software may be "burned in" into a circuit so that it could only be changed by physically rewiring the circuit (the ME spyware in [Intel](intel.md) [CPU](cpu.md)s has a built-in [minix](minix.md) operating system). And this is where it may sometimes be difficult to decide where the line is drawn. This issue is encountered e.g. by the [FSF](fsf.md) which certifies some hardware that works with free software as "Respects Your Privacy" (RYF), and they have very specific definition what to them classifies software.
Usually we can pretty clearly say what is software vs what is hardware, however there are also edge cases where it's debatable. Normally software is that about the computer which *can relatively easily be changed* (i.e. reinstalled by a typing a few commands or clicking a few buttons) while hardware is [hard-wired](hard_wired.md), difficult to modify, and not expected or designed to be modified. Nevertheless e.g. some [firmware](firmware.md) is kind of software in form of instructions which is however many times installed in some special kind of memory that's difficult to reprogram and not expected to be reprogrammed often -- some software may be "burned in" into a circuit so that it could only be changed by physically rewiring the circuit (the [ME](intel_me.md) spyware in [Intel](intel.md) [CPU](cpu.md)s has a built-in [minix](minix.md) operating system). And this is where it may sometimes be difficult to decide where the line is drawn. This issue is encountered e.g. by the [FSF](fsf.md) which certifies some hardware that works with free software as *Respects Your Freedom* ([RYF](ryf.md)), and they have very specific definition what to them classifies software.
## See Also
- [algorithm](algorithm.md)