Q.Expand PIC.

The PIC — short for Peripheral Interface Controller — is a family of microcontroller chips made by Microchip Technology. A PIC is a fully featured processor carrying its own internal RAM, EEPROM/flash memory and peripherals, and it is extremely popular with hobbyists and in robotics because it is cheap, widely available, well documented and easy to program.

Its defining design choice is a RISC (Reduced Instruction Set Computer) architecture: the PIC has only 35 instructions, nearly all of which execute in the same number of clock cycles. This makes program timing easy to predict and lets efficient code fit into less program memory than larger rivals need. …