The purpose for USB was to provide a universal interface that would eventually replace different types of peripheral interfaces (parallel ports, serial ports, PS/2, etc.), while maintaining wide compatibly with current and future Windows operating systems. Since late 1996, Windows operating systems have been equipped with USB drivers or special software designed to work with specific USB I/O devices complying with the USB 1.0 Standard.With the introduction of Windows 98, a newer USB 1.1 standard was, for the first time, completely integrated within the operating system. The newer USB 1.1 Standard provided for tighter integration with Microsoft's Plug and Play standard (PnP), making installation of external devices and peripherals virtually hassle free, while still maintaining backward compatibility with existing USB 1.0 devices. USB has since been integrated into every Windows operating system, with the exception of Windows NT.

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