What are the differences between the following operating systems: DOS,Windows,Linux, Unix and Mac OS?Posted in Collaboration Tools on 08/19/2013 09:40 pm by
Question by I love OZ.: What are the differences between the following operating systems: DOS,Windows,Linux, Unix and Mac OS?
can someone please help me to answer this question. it’s for my Technology class
Answer by Erfan Soleymani D
All DOS-type operating systems run on machines with the Intel x86 or compatible CPU s, mainly the IBM PC and compatibles. Initially, DOS was not restricted to these, and machine-dependent versions of DOS and similar operating systems were produced for many non-IBM-compatible x86-based machines. In particular, DOS-C’s predecessor DOS/NT ran on Motorola 68000 CPU’s.DOS is a single-user, single-task operating system with basic kernel functions that are non-re entrant: only one program at a time can use them. There is an exception with Terminate and Stay Resident (TSR) programs, and some TSR s can allow multitasking. However, there is still a problem with the non-re entrant kernel: once a process calls a service inside of operating system kernel (system call), it must not be interrupting with another process calling system name, until the first call is finished.The DOS kernel provides various operating for programs, like exhibiting characters on-screen, reading an inscribing from the keyboard, accessing disk files and more.Microsoft Windows is a series of software operating systems and graphical user interfaces produced by Microsoft. Microsoft first introduced an operating environment named Windows in November 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces (GUIs). Microsoft Windows came to dominate the world’s personal computer market, overtaking Mac OS, which had been introduced previously. As of October 2009, Windows had approximately 91% of the market partaking of the client operating systems for usage on the Internet. The most recent client version of Windows is Windows 7; the most recent server version is Windows Server 2008 R2; the most recent mobile device version is Windows Mobile 6.5.Linux (commonly pronounced /ˈlɪnʌks/, LI-nuks in English, also pronounced /ˈlɪnʊks/, LI-nooks) is a generic term referring to Unix-cared computer operating systems based on the Linux kernel. Their development is 1 of the most prominent examples of free and open source software collaboration; typically all the underlying source code tinned be used, freely modified, and redistributed, both commercially and non-commercially, by anyone under licenses such as the GNU General Public License.Linux can be installed on a wide variety of computer hardware, ranging from embedded devices such as mobile phones, smartphones and wristwatches to mainframes and supercomputers. Linux is predominantly known for its use in servers; in 2007 Linux’s overall share of the server market was estimated at 12.7%, while a 2008 estimate suggested that 60% of all web servers ran Linux. Most desktop computers run either Mac OS X or Microsoft Windows, with Linux having only 1–2% of the desktop market. However, desktop use of Linux has become increasingly popular in recent years, partly owing to the popular Ubuntu distribution and the emergence of netbooks and smartbooks.Typically Linux is packaged in a format known as a Linux distribution for desktop and server use. Linux distributions include the Linux kernel and all of the support software needful to run a complete system, such as utilities and libraries, the X Window System, the GNOME and KDE desktop environments, and the Apache HTTP Server. Commonly-used applications with desktop Linux systems include the Mozilla Firefox web-browser and the OpenOffice.org office application suite.The name “Linux” comes from the Linux kernel, originally written in 1991 by Linus Torvalds. The contribution of a supporting Userland in the form of system tools and libraries from the GNU Project (announced in 1983 by Richard Stallman) is the basis for the Free Software Foundation’s preferred name GNU/LinuxUnix (formally trademarked as UNIX, sometimes also scripted as Unix with small capping) is a computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna. Today the called “Unix” is commonly used to describe any operating system that conforms to Unix standards, meaning the core operating system operates similarly to the original Unix operating system. Today’s Unix systems are separated into various branches, developed over time by AT&T as well as various commercial vendors and non-profit organizations.As of 2007, the owner of the trademark is The Open Group, an industry standards consortium. Only systems fully compliant with and certified according to the Single UNIX Specification are qualified to use the trademark; others are called “Unix system-like” or “Unix-like” (though the Open Group disapproves of this term).During the late 1970s and early 1980s, the influence of Unix in pedantic circles led to large-scale adoption of Unix (particularly of the BSD variant, originating from the University of California, Berkeley) by commercial startups, the most notable of which are Mac OS X, Solaris, HP-UX and AIX. Today, in addit
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