What is the Meaning of Windows | Definition and Concepts

Windows is a group of operating systems designed and marketed by the company Microsoft. As the most famous and used in the world operating system, Windows has laid the Foundation and served as a model as a family of OS (operating systems) since its inception. Windows has different versions over the years and different options for home, business, mobile devices, and in accordance with the variation in the processor. Most of the PCs are currently sold with any version of Microsoft Windows pre-installed.
The first version of Windows - 1.0 - was given out in 1985 by Microsoft. It was a GUI for the MS-DOS operating system. Onwards, the company was able to launch new versions, through 2.0 and 3.0, the Millennium, 2000, XP, and most recently, Windows Vista, with a number of apps and functions much more personalized and advanced user. At the same time, Windows Mobile, was launched for use on mobile and cellular devices.
Currently, it's the operating system most used and sold worldwide. However, today is a lot of competition with Apple and Linux operating systems, a set of open source and free to use.
The acquisition of Windows in general includes other frequently used applications such as the web browser Internet Explorer, the Windows Media Player for multimedia files, Windows Movie Maker for the production of home movies, the Windows Messenger Instant Messaging program, Windows Paint for editing images and several others.
Despite its popularity, the system has been long criticized by other companies and computing enthusiasts who found in it not just a copy of other programs such as those designed by Apple, but also problems in usability and security criteria, which makes it vulnerable to multiple viruses and malicious programs.