Where is the operating system of a Raspberry Pi typically stored?

The operating system of a Raspberry Pi is typically stored on a removable SD card. This is a defining feature of Raspberry Pi devices, allowing users to easily install or change the operating system by simply swapping out the SD card. The SD card contains the bootable image of the operating system, along with any software and settings that the user has configured.

Using an SD card also contributes to the portability and flexibility of the Raspberry Pi, making it possible to carry different operating systems and projects in a compact form. While other storage options like USB flash drives can be used to run the operating system, the standard and most common method for Raspberry Pi setups is through the removable SD card.