What process is when the operating system is loaded into RAM and the desktop is visible on the screen?

The process when the operating system is loaded into RAM and the desktop becomes visible is called "booting." This begins with the computer's firmware, such as BiOS or UEFI, initializing hardware components, followed by loading the operating system from storage into RAM. Once the OS is loaded, it initializes system settings and user interfaces, culminating in the display of the desktop environment for user interaction.