It existed on the boundary between hardware and software; thus the name "firmware".Over time, popular usage extended the word "firmware" to denote any computer program that is tightly linked to hardware, including processor machine instructions for BIOS, bootstrap loaders, or the control systems for simple electronic devices such as a microwave oven, remote control, or computer peripheral.The BIOS may be "manually" updated by a user, using a small utility program.
Devices such as printers, scanners, cameras and USB flash drives have internally stored firmware; some devices may also permit field upgrading of their firmware.
Firmware can either provide a standardized operating environment 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.
A television remote control is an example of an engineered product that contains firmware.
The firmware monitors the buttons, controls the LEDs, and processes the button presses in order to send the data in a format the receiving device, in this case, a television set, can understand and process.