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Thread: What does windows OS use??

  1. #11
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    Re: What does windows OS use??

    Windows has used the Windows NT kernel since Windows NT was released.

  2. #12
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    Re: What does windows OS use??

    The Structure of a Computer
    User
    Software
    Operating System
    Kernel
    Hardware

    The user is someone who determines what he wants the computer to do. Remember, computers are incredibly fast but incredibly stupid, and require humans to tell them what to do. Software is the common ground between the user and the computer. Software allows normal humans to command a computer with functions, but the functions were predetermined by a programmer, someone who had originally told the computer what to do. The operating system is the middle ground between the user and the kernel, and brings computing down the human level to where we can act and comprehend ( we don't exactly read 0's and 1's as efficiently as computers do ). The kernel can be described as the central brain of the computer where all data is managed, only demi-gods can actually comprehend what really goes on in the kernel. Finally, we have hardware, which is the physical part of the computer. All your graphics cards, hard drives, and monitors are hardware.

    Hope this helped any :X
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  3. #13
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    Re: What does windows OS use??

    Quote Originally Posted by myromance123 View Post
    So what is MS-DOS to windows? is it like a kernel?
    MS-DOS is dead. http://en.wikipedia.org/wiki/MS-DOS#End_of_MS-DOS

    As well, why is Windows not listed as a Unix OS?
    Windows is not a POSIX-compliant OS. Therefore it's not Unix or a variant. http://en.wikipedia.org/wiki/Posix
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  4. #14
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    Re: What does windows OS use??

    Quote Originally Posted by myromance123 View Post
    From what I understand a kernel is like the basic brain of a Unix system no?
    Normally every OS has a kernel, which is just one file.
    So what is MS-DOS to windows? is it like a kernel?
    In MS-DOS there were the files msdos.sys and io.sys in C:, one of them was the kernel afaik.
    I don't know what the kernel name is in the MS Windows versions.
    As well, why is Windows not listed as a Unix OS?
    For being called Unix or Unix alike, you would have to follow certain POSIX standards.
    I think I've read that only Windows NT partially followed that.
    There are times I see in books that BSD is also not Unix but then there are times its listed under Unix too?
    Unix is a trademark.
    Linux and FreeBSD, NetBSD, OpenBSD are Unix alikes, or Unix derivates.

    See here for more background information :
    http://en.wikipedia.org/wiki/Unix
    http://en.wikipedia.org/wiki/BSD
    Last edited by albinootje; February 2nd, 2009 at 08:23 PM.

  5. #15
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    Re: What does windows OS use??

    So what is MS-DOS to windows? is it like a kernel?
    Or are these to things completely different?

    As well, why is Windows not listed as a Unix OS?
    There are times I see in books that BSD is also not Unix but then there are times its listed under Unix too?

    What is it that separates these OSs from one another?
    MS-DOS and the current Windows Vista are very different beasts. MS-DOS was a single-tasking, 16-bit, command line operating system that consisted of a kernel and command line interpreter with a lot of additional yet separate programs to make up an operating system.

    Windows Vista is the descendant of Windows NT 3.1. Windows NT was originally designed as a microkernel operating system by David Cutler (MS got him from DEC). Windows NT 3.1 through 3.51 was a unique microkernel design that was portable (ran on x86, MIPS, Alpha, & PowerPC CPU's, both 32 and 64 bit), contained a POSIX compatible layer, an OS/2 compatible layer, and a DOS compatible layer. These compatibility layers were rudimentary and limited, but MS was making an attempt to be cross compatible. Starting with NT 4, the microkernel grew into a monolithic-style kernel by running the graphics subsystem and filesystem code within the memory space of the kernel.

    Here is one definition of micro vs. monolithic kernels - microkernels typically run as little code as possible inside the kernel context and memory space. Things like device drivers, filesystem code, GUI's, network stacks are all running outside of kernel space in a microkernel design. Very few OS's are tru microkernels, QNX is one. Almost all Unixes are NOT microkernel designs. Linux, BSD, Solaris, AIX, etc, are not microkernel designs. OS/X from Apple is one example of a Unix type operating system that uses a microkernel, borrowed from MACH and the research done at MIT back in the 1980's that NeXT used for the NeXT Step operating system.

    Monolithic kernels, like Windows Vista, Linux, BSDs, Solaris, all run a ton of code withing the kernel address space and context. Windows and most Unixes run the filesystem code, the network stack, and device drivers all within the kernel address space and context. Windows goes one further and runs the GUI in the kernel space too. Monolithic kernels perform better than microkernels, at least with regards to user experience.

    Unix is a trademark and tightly controlled. The process and expense of having an operating system "certified" as Unix is not worth BSD's time and effort, plus everyone knows the BSD's are unix, not Unix. Windows is a proprietary kernel that bears no resemblance to Unix, however, Windows does maintain some POSIX compatibility which gives it some unix-like features.

    As for the separation of OSes? Many things differentiate OS designs and implementations. Do a Yahoo search on operating systems and you will be amazed at the number and variety. Windows, Unix, OS/X, Linux are just four. There are hundreds of operating systems, mostly research projects (as opposed to commercial) but there a many niche commercial operating systems out there. Just think of the system running ballistic missiles, now there's an operating system that I wouldn't know a thing about.
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  6. #16
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    Thumbs down Re: What does windows OS use??

    I would just like to add that Linux has never been, nor ever will be "UNIX-based", Linux is simply an original kernel inspired by the UNIX kernel. They share no code what-so-ever.

    The *BSDs are UNIX, but are not the true UNIXs. BSD broke off in the UNIX source tree way before UNIX System Revision IV (Or I for that matter), ever came out.

    Here is a nice little diagram of the origins:

    http://upload.wikimedia.org/wikipedi...ory-simple.svg

    (It's an SVG, so it's resizable. If it doesn't work correctly, hit "CTRL -" a couple times.)

  7. #17
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    Re: What does windows OS use??

    Quote Originally Posted by albinootje View Post
    Unix is a trademark.
    Linux and FreeBSD, NetBSD, OpenBSD are Unix alikes, or Unix derivates.
    The BSDs are direct descendants of Unix. Linux is not.

  8. #18
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    Re: What does windows OS use??

    Listing Operating System and Kernel as components of computer is incorrect. Kernel is included in the OS. Kernel is the basic group of functions that provide the basic activity of the operating system.

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    Re: What does windows OS use??

    Whenever you see the kernel coming, be happy you are a duck!

  10. #20
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    Re: What does windows OS use??

    BTW, how MACOS´s kernel suits here? My a appreciation is that its an unix-based microkernel with kernel-modules attached to it?

    Quote Originally Posted by Grant A. View Post
    Here is a nice little diagram of the origins:
    Mmm, Minix is a stand alone project?
    Last edited by druellan; February 3rd, 2009 at 03:32 PM.

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