What are the key features of ARM processors?

ARM (Advanced RISC Machine) features include: RISC architecture with simple, fixed-length instructions, Load-store architecture (operations only on registers), Large register set (typically 16 general-purpose registers), Conditional execution of instructions, Barrel shifter for efficient shift operations, Low power consumption due to simple design, Thumb instruction set for code density, and Multiple operating modes. ARM dominates mobile and embedded markets due to power efficiency, with variants from Cortex-M (microcontroller) to Cortex-A (application processors).