What term describes the ability to run more than one application simultaneously?

The term that describes the ability to run more than one application simultaneously is multitasking. This concept refers to the capability of an operating system or computer to manage multiple tasks at the same time, allowing users to operate several applications concurrently without significant delay or disruption. Multitasking can be seen in various forms, such as time-sharing, where the CPU rapidly switches between tasks, giving the illusion that they are occurring simultaneously.

When a user has multiple applications open—such as a web browser, word processor, and email client—they can switch between them smoothly while each application continues to run in the background. This functionality enhances user productivity and improves the overall computing experience, as it allows for seamless transitions between different tasks.

The other options do not accurately capture this concept. Single-tasking refers to the ability to run only one application at a time. Concurrent processing might imply simultaneous execution, but is generally more associated with programming and parallel processing rather than user interaction with multiple applications. Sequential task management indicates a linear approach toward completing tasks one after another, which does not involve simultaneous execution. Thus, multitasking is the precise term for running multiple applications at the same time.