Final answer:
The term that began as a computing concept and now means performing several tasks at the same time is Multitasking.
Step-by-step explanation:
The term that originated in the realm of computing but is now commonly used to refer to the practice of doing multiple tasks at the same time is Multitasking. Choices B) Simultaneous and C) Concurrent also relate to things happening at the same time, but they do not specifically denote handling multiple tasks by one entity. Choice D) Sequential, by contrast, refers to things happening one after another, not at the same time. Therefore, the correct answer to your question is A) Multitasking, which accurately captures the concept of performing several jobs simultaneously.