Learn to differentiate BIOS and Firmware

The computer is a part of day-to-day almost the whole world and of the work routine of many people, but all of its features and components can be somewhat complex to understand. In addition, surely you must have heard in some terms, but never knew what they were dealing with.

Examples of this are the BIOS and the Firmware. If you don’t know, do you still have doubts about them or even tatt the confude, the time has come to clarify things in a very simple way.


The BIOS is a firmware for motherboards of computers and an acronym for Basic Input and Output. It can also be known as System BIOS, ROM BIOS or PC BIOS.

This firmware is used during the booting process (power-on/start up) on computers based on the IBM PC architecture. The BIOS is built into PCs and it is the first software to run when the machine is turned on.

Its name is derived from the system’s Basic Input/Output used on the operating system CP/M, 1975. Current computers have other firmwares that replace called UEFI or EFI.


The firmware is the combination of persistent memory, program code and data stored in it. Systems that have firmware that can be found in traffic lights, household appliances, digital watches, computers, computer peripherals, mobile phones and digital cameras. In the devices, the firmware has the function to provide the control program for the apparatus.

On computers there are other types of firmware in addition to BIOS, UEFI and EFI. Video cards, network cards, hard disk controllers and sound cards, for example, have their own firmwares.

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