What is BIOS and Its Uses?

You power on your computer, and within moments, the screen comes to life, your operating system boots up, and you're ready to use your computer. But do you know what happens behind the scenes? What happens right after you switch on and before the operating system starts?

That's where BIOS comes into play. BIOS is one of the primary elements which makes your computer accessible to you. 

In this blog, you will explore what BIOS is, how it works, and why it's so crucial in your computing experience.

We will also touch upon the concept of what is ethical hacking?

What is BIOS?

Let's start with answering what BIOS is. BIOS stands for Basic Input/Output System. BIOS is software embedded in a chip in the motherboard of the computer. An American computer scientist, Gary Kildall, coined BIOS in 1975. 

However, the first implementation of BIOS in a personal computer was in 1981 when IBM introduced it as their first personal computer. From then, BIOS became an essential part of computers until Unified Extensible Firmware Interface or UEFI started taking its place. 

It is a newer technology which is now becoming common in personal computers. It is referred to as the future of BIOS. You will get to know more about it further in the blog.  

What is the Use of BIOS?

The use of BIOS in personal computers can be categorized into five functions. Here are the functions that a BIOS can do on a computer.

Bridge Between Hardware and Software

Firstly, the BIOS bridges the computer's hardware and software. It translates the commands of hardware components of a computer to the software so that the required action can be done. For example, if you press any key on your keyboard, then the BIOS will translate it to get the function done, which is intended. 

Power-On Self-Test (POST)

The BIOS is used to do POST. When you turn on your computer, BIOS checks all the parts to ensure they're ready to work. If it finds everything okay, then the system boots successfully. But if there's a problem, BIOS lets you know with messages on the screen.

Bootstrapping

When you press the power button, BIOS springs into action. It loads a small program from a chip on the motherboard. This program knows where to find your operating system like Windows or macOS and helps it start.

Hardware Initialization

BIOS initializes all the hardware components – like the processor, memory, and hard drive. It makes them ready to work together in sync. It ensures that your computer can run smoothly without any glitches.

System Configuration and Setup Utility

BIOS also lets you create custom settings on your computer. It can be done by accessing the BIOS menu. In the BIOS menu, you will find many settings to customize your computer.

Accessing the BIOS on your computer is easy. You will find the steps to access the BIOS menu in the next heading. 

How do you access bios on your computer?

You can access BIOS on your computer by following these simple steps. 

First, restart your computer and wait for the starting screen, which comes after the logo of the monitor's company.When the starting screen appears, you will see a function key written on the screen, which can be any function key from F1 to F12. Press that key on your keyboard and wait.Now, the BIOS menu will appear on your monitor's screen. Here you can make a lot of changes according to you. You can customize the software and hardware of your computer for optimum performance. 

What is UEFI?

Now, let's move from what is BIOS to UEFI. But why? UEFI, which stands for Unified Extensible by Firmware Interface, is the newest trend in computer booting technology. BIOS has become an ancient technology that even updates can't make it as modern as UEFI. 

UEFI is a new specification used to boot present-day computers. Intel, in 2017, had already announced that it would replace the traditional BIOS with UEFI as a more convenient option. 

The UEFI firmware can boot an OS and other relative components from a drive of 2.2 TB or more. However, the maximum limit of UEFI is 9.4 zettabytes, which is theoretical as it is more than thrice the estimated data stored in all the storage devices on earth. 

If you have the latest computer or laptop, it probably has UEFI firmware instead of traditional BIOS. But, if you access the BIOS menu of your computer, it will still refer to it as BIOS. It is done to eliminate any confusion between the users. Moreover, the menu of UEFI is also similar to the BIOS.

Besides these similarities, UEFI is much more powerful than BIOS. It can boot your computer faster. Currently, the UEFI computer firmware has backward compatibility for traditional BIOS so that the older versions of OSes can be accessed in case a user wants to. 

What is ethical hacking?

Do you also visualize hackers as people with extraordinary knowledge of computers who illegally hack computers to earn their bread and butter? If yes, then it's not your fault. Then what are hackers? To answer this question, first, let's answer what ethical hacking is. 

Hacking is of two types, namely ethical and unethical hacking. Ethical hacking refers to the attempt to gain access to someone's computers without their permission but under authorities' surveillance. On the other hand, unethical hacking is when the same thing is done but for illegal purposes. 

The one who practices ethical hacking is called a white hat hacker and works for government agencies and big tech organizations. However, unethical hackers, also known as black hat hackers, are mostly involved in illegal activities. 

Summing Up

BIOS has been an important part of computers for a very long time. The use of BIOS in personal computers is one of the reasons that we can use computers today. However, UEFI has started taking the place of BIOS, but the role of BIOS can never be forgotten. 

Moreover, it is still important to know what BIOS is as it has been the base of computers for years and can help to develop new technologies.