The MOS Technology 6502 is an 8-bit microprocessor introduced in 1975. It was designed for low-cost applications and became popular in home computers and video game consoles. Its architecture features a simple instruction set and efficient use of memory, making it accessible for developers. The 6502 was used in many iconic systems, including the Apple II, Commodore 64, and Nintendo Entertainment System. Its affordability and performance contributed to the rise of personal computing in the late 1970s and early 1980s, influencing the design of future microprocessors.