The ARM architecture was developed by Acorn Computers in the 1980s. Computer class PCs appear relatively rarely. But it's great on mobile devices.
Due to the combination of a simple architecture with a reduced RISC instruction set and low power consumption, mobile devices have a far better choice than desktop processors.
Reduced instruction set computing or RISC is the design of a processor that works with the fact that the simplified instruction set provides higher performance in combination with a microprocessor architecture capable of executing these commands using a smaller number of calculation cycles per instruction. We are also hampered by such platforms as ARM, i860, SPARC, PA-RISC, POWER-PC and MIPS.
In ARM devices, there are no heat dissipators or active coolers. Thanks to low power consumption, the processor produces very little waste heat, even during complicated computational operations.
Link to processors ARM website => http://www.arm.com/products/processors