Developing hardware diagnostic utilities can be another area. The kinds of utilities that come built into ROM, or that you run from a CD or USB drive, where y

Developing hardware diagnostic utilities can be another area. The kinds of utilities that come built into ROM, or that you run from a CD or USB drive, where you test memory and disk by writing different bit patterns to them, reading them back, and checking if they match, probing the hardware, processor and peripherals, etc.