Types of memory

Component	Speed	Size
Registers (CPU)	Fastest	bytes
L1 cache (CPU)	Faster, save for the above)	kilobytes
L2 cache (CPU)	Very fast	megabytes
L3 cache (CPU)	Fast but slower than the above	megabytes
Random Access Memory	Much slower than the above	giga -> terabytes
Storage	Slow	terabytes