Firmware vs Drivers vs Software: Understanding Their Core Roles

No matter which operating system we use—Windows, macOS, or Linux—there are many software, drivers, and firmware installed, but these three concepts differ.

The textual description can be abstract, so we first look at a comic.

After the comic, we look at the formal explanation.

In short, the fundamental difference between firmware, drivers, and software lies in their design purpose.

Firmware is the program that gives hardware life.

Driver is the intermediary between the operating system and hardware components.

Software can indirectly operate hardware.

1. Firmware

Firmware is a program written into ROM (Read‑Only Memory) that performs the most basic, low‑level functions of a system and directly controls hardware; for example, the BIOS is the first program that runs when a computer powers on, interacting with hardware and checking for errors.

The BIOS invokes a bootloader, which wakes the operating system stored on the hard drive and loads it into RAM.

Firmware can be found in many devices, including computers, phones, remote controls, game consoles, smart watches, USB drives, and various embedded systems. Even a TV remote has pre‑installed firmware that changes the channel when you press a button.

2. Driver

A driver is a small piece of code added to the operating system that contains information about a hardware device. When a program requests interaction with a device, the driver acts as a translator between the hardware and the program.

Because an operating system does not support every piece of hardware out of the box, hardware manufacturers usually write drivers for their devices.

Each driver is intended to work for a specific device or set of devices, using various bus interfaces to communicate. Drivers generally do not interact directly with users, so many users are unaware of their existence.

Driver development must be done carefully, as drivers interact directly with both hardware and the operating system; a faulty driver can cause system crashes, which is why professional teams are needed to write them.

Why not make firmware perfect so that drivers are unnecessary? Different operating systems handle hardware in distinct ways, so drivers must be written to serve each OS.

3. Software

Unlike hardware, software runs inside a computer and cannot be touched.

The operating system itself is software and provides a workspace for other software to run. Device drivers are also a type of software, specifically system software.

If a user writes a program that wants to control hardware (e.g., a CD drive or USB stick), they must use the interfaces provided by the operating system rather than interacting with hardware directly.

It is worth noting that “software” is a broad term; in everyday use it usually refers to application software such as WeChat, QQ, browsers, and so on.