This report contains two papers, An Introduction to Microsoft Windows NT And Its Competitors, and The Status of Windows NT and Its Competitors At The End of 1993. The first paper, written in April 1993, presents an overview of the technology of Windows NT, and analyzes the competitors and competitive factors in the desktop operating system race. It compares systems from historical, commercial, and technical perspectives. The second paper, written in December 1993, describes the status of the competition as of that date. It tracks the early market response to NT, the products available and planned for NT, and the status of NT's competitors.