would u mind telling me please I'm really interested in this kind of stuffs.
ARM is very popular in both embedded and "embedded" (= smart phones) devices.
Check the processors of the smart phones and tablets of the people around you, and then check
if the processor has ARM core(s).
Like Samsung Galaxy S4 has Quad-core 1.6 GHz Cortex-A15 (primary) and quad-core 1.2 GHz Cortex-A7(companion)
in its Exynos 5 Octa 5410. Also the later Galaxies are based on ARM architecture.
If you wonder why ARM is used that much, I think the idea is that the chip factories can produce chips a lot cheaper,
when they don't have to design their chips: they just buy the design from ARM. Arm on the other hand can sell chip designs
cheaper, because there are many paying companies. (Actually licensing.) Compare that with a situation that
all chip manufacturers have to design their chips from the ground up. The design costs.
=> more bang for a buck.