An "all-in-one" is a type of device that combines multiple functions into a single unit. Commonly found in computers, an all-in-one typically integrates the monitor and the computer's hardware, eliminating the need for a separate tower. This design saves space and reduces cable clutter, making it a popular choice for home and office use. In addition to computers, all-in-ones can also refer to appliances like printers that combine printing, scanning, and copying capabilities. These versatile devices are designed to streamline tasks and improve efficiency, catering to users who prefer convenience and simplicity in their technology.