Which device receives signals from a computer and displays them onto a screen?

The device that receives signals from a computer and displays them onto a screen is the monitor. Monitors are essential output devices designed to visually present data and information processed by the computer. They convert the digital signals generated by the computer's graphics card into an image, allowing users to see text, images, videos, and GUI elements.

In contrast, a printer is an output device that produces a physical copy of documents or images, while a scanner is an input device that captures images or documents and converts them into a digital format. Speakers are also output devices, but they are specifically used for audio output, translating digital audio signals into sound. Thus, the role of a monitor is uniquely suited to the specific function of displaying visual content from a computer.