Operating Systems Exam Revision: Part 1: Memory: (img: https://i.gyazo.com/bd7a71da5d7339631748d14df9140d55.png)
	- Primary memory: This includes: Registers, cache and main memory (the RAM: random access memory). While the memory size of these are small, they can be accessed very quickly. The bigger the RAM, the faster and better your CPU will perform!

	- Secondary memory: This includes: Electronic disk, magnetic disk, optical disk, and magnetic tapes. This memory is considered 'secondary storage', and as such they are capable of holding far more memory, but accessing them takes a lot of time.

	- to execute programs, all the information required needed will eventually need to be loaded into the main memory. All data is stored in the secondary memory.

	- primary memory is considered 'volatile', as when the CPU is turned off, it will lose all memory that was stored inside it. Conversely, secondary memory is considered 'non-volatile', because it retains memory even when the CPU is off.