Windows 10 introduced Windows as a service, a method of continually providing new features and capabilities through regular feature updates. Semi-Annual Channel versions of Windows, such as version 1909, version 2004, and version 20H2, are released twice per year.
In addition to Semi-Annual Channel releases of Windows 10 Enterprise, we also developed a Long Term Servicing Channel for Windows, known as Windows 10 Enterprise LTSC, and an Internet of Things (IoT) version known as Windows 10 IoT Enterprise LTSC. Each of these products was designed to have a 10-year support lifecycle, as outlined in our lifecycle documentation.