Updating the firmware dating tests for teenagers
However, unlike most modern operating systems, firmware rarely has a well-evolved automatic mechanism of updating itself to fix any functionality issues detected after shipping the unit.
If firmware is upgradable, it is often done via a program from the provider, and will often allow the old firmware to be saved before upgrading so it can be reverted to if the process fails, or if the newer version performs worse.
Other features that may change with firmware updates include the GUI or even the battery life.
Most mobile phones have a Firmware Over The Air firmware upgrade capability for much the same reasons; some may even be upgraded to enhance reception or sound quality, illustrating the fact that firmware is used at more than one level in complex products (in a CPU-like microcontroller versus in a digital signal processor, in this particular case).
Since 1996 most automobiles have employed an on-board computer and various sensors to detect mechanical problems.
As of 2010, modern vehicles also employ computer-controlled ABS systems and computer-operated transmission control units (TCUs).
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Over time, popular usage extended the word "firmware" to denote any software 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.