How many types of windows operating systems are available in the market?

Microsoft is the developer of the windows operating system. Presently there are three operating systems available in the market. They are windows xp, windows vista and windows 7. There are many great features of windows operating systems as listed below: 1. Exceptional print and file services. 2. Support for umpteen client/server applications. 3. Great security features. 4. Integrates with NetWare, LAN Manager, UNIX, PATHWORKS and SNA.. 5. Instantly accessible and up-to-date information. 6. Hardware auto-detect and CD-ROM-based Express Setup. 7. User friendly graphical environment. Windows 7 Enterprise is the best suited Windows operating system for business PCs that are used in the corporate world. It has been designed so as to meet the evolving needs of the users and IT professionals in the organization, both in and out of the office. Windows Vista was released after windows XP in the year 2007. Windows Vista was less prone to security intercepts. However, it had a myriad of bugs like system getting slow, system running out of memory and crashes. It was succeeded by windows 7 which is in use nowadays.