Final answer:
The device described in the question is a keyboard, which contains a series of single-pole, single-throw switches mounted to a circuit board. Keyboards are commonly used for inputting text and commands into computers.
Step-by-step explanation:
The device described in the question is a keyboard.
A keyboard is a device that contains a series of single-pole, single-throw switches mounted to a circuit board. Each switch represents a different key and when pressed, it sends an electrical signal to the computer to input that specific character or command.
Keyboards are commonly used for inputting text and commands into computers.