999os

999os is a fictional operating system that appears in the 2020 video game Cyberpunk 2077. It is depicted as the primary operating system used by the citizens of Night City, a sprawling metropolis in the game's dystopian future. The name "999os" is a play on the emergency telephone number 999, commonly used in some countries.

In the context of Cyberpunk 2077, 999os serves as the interface through which players interact with the game's world. It is integrated into various devices, including cybernetic implants, personal computers, and vehicles. The operating system is characterized by its futuristic and often intrusive user interface, reflecting the game's themes of advanced technology and corporate control.

While 999os is a fictional construct, it draws inspiration from real-world operating systems and user interface design principles. Its visual elements, such as holographic displays and integrated augmented reality features, contribute to the immersive experience of Cyberpunk 2077. The operating system's presence in the game underscores the pervasive nature of technology in the lives of its characters. It is not a real operating system that can be installed or used on actual hardware.