What type of software manages the complete operation of a computer or mobile device?

A) Web app
B) Operating system
C) Utility
D) Settings software

An operating system is the type of software that manages the complete operation of a computer or mobile device. It controls all the hardware and software resources, making it possible for them to work together smoothly and efficiently. Examples of popular operating systems include Windows, macOS, iOS, and Android. Web apps, utilities, and settings software are all types of applications that run on top of an operating system.