Devices and smart home
BIOS
Abbreviation for Basic Input/Output System
In short and in plain language
The BIOS is the basic software of a computer.
It starts when you switch on, before the operating system.
In its settings you can set the boot order. You can also set up safety features.
Newer computers mostly use a newer kind. People often still call it by the old name.
Definition
The BIOS is the basic software of a computer that starts before the operating system. Its settings control things like the boot order and security features. Newer computers mostly use the successor UEFI, which is often still called BIOS.