Windows 2000 was part of the Windows NT family and aimed at business and professional users. It brought significant improvements in security, networking, and support for server environments. There were two editions: Windows 2000 Professional and Windows 2000 Server. Development and Release: Announcement and Development : Microsoft officially announced Windows 2000 on September 24, 1997. It was developed under the codename "NT 5.0" and was part of the Windows NT family. Release Date : Windows 2000 was released to manufacturing (RTM) on December 15, 1999, and it became generally available to the public on February 17, 2000. Key Features and Innovations: Business and Professional Focus : Windows 2000 was designed primarily for business and professional users. It included features aimed at corporate environments. Active Directory : One of its most significant features was Active Directory, a centralized directory service for managing network resources. Improved Security : It intr...