Firmware used to be permanent and changing the firmware of a device was rarely or never done during its lifetime. Now changing Firmware is a common practice for fixing bugs or adding features to a device.
Firmware can either provide a standardized Operating System for the device's more complex software (allowing more hardware-independence), or, for less complex devices, act as the device's complete Operating System, performing all control, monitoring and data manipulation functions. Typical examples of devices containing firmware are embedded systems, consumer appliances, computers, computer peripherals, and others.
Firmware is present in almost all electronic devices beyond the very simplest devices.
More Information#There might be more information for this subject on one of the following:
- Booting with GRUB
- Media Access Control Address
- Roots of Trust
- Secure Enclave
- SmartMessage Language
- Unified Extensible Firmware Interface