Every time a speech sound is produced, it will be slightly different from other utterances. Only some of the variation is significant (i.e., detectable or perceivable) to speakers. There may be complementary allophones which are distributed regularly within speech according to phonetic environment, as well as notable free variants, which are a matter of personal habit......

The first devices that resemble modern computers date to the mid-20th century (1940–1945), although the computer concept and various machines similar to computers existed earlier. Early electronic computers were the size of a large room, consuming as much power as several hundred modern personal computers(PC).^[1] Modern computers are based on tiny integrated circuits and are millions to billions of times more capable while occupying a fraction of the space.^[2] Today, simple computers may be made small enough to fit into a wristwatch and be powered from a watch battery. Personal computers, in various forms, are icons of the Information Age and are what most people think of as "a computer"; however, the most common form of computer in use today is the embedded computer. Embedded computers are small, simple devices that are used to control other devices — for example, they may be......

Microsoft Corporation is an American multinational computer technology corporation, which rose to dominate the home computer operating system market with MS-DOS in the mid-1980s, followed by the Windows line of operating systems.

It develops, manufactures, licenses, and supports a wide range of software products for computing devices.^[9][8] Microsoft's best-selling products are the Microsoft Windows operating system and the Microsoft Office suite of productivity software.

Throughout its history the company has been the target of criticism for various reasons, including monopoly status and anti-competitive business practices including refusal to deal and tying. The U.S. Justice Department and the European Commission, among others, have ruled against Microsoft for various antitrust violations.

Linux is an operating system that was initially created as a hobby by a young student, Linus Torvalds, at the University of Helsinki in Finland. Linus had an interest in Minix, a small UNIX system, and decided to develop a system that exceeded the Minix standards. He began his work in 1991 when he released version 0.02 and worked steadily until 1994 when version 1.0 of the Linux Kernel was released. The kernel, at the heart of all Linux systems, is developed and released under the GNU General Public License and its source code is freely available to everyone. It is this kernel that forms the base around which a Linux operating system is developed. There are now literally hundreds of companies and organizations and an equal number of individuals that have released their own versions of operating systems based on the Linux kernel. More information on the kernel can be found at our sister site, LinuxHQ and at the official Linux Kernel Archives. The current full-featured version......