Intel 8086
The Intel 8086 is a 16-bit microprocessor introduced in 1978.
The 8088 is a version with an external 8-bit data bus, notable as the processor used in the original IBM PC design.
The 80186 is an improved version designed for embedded systems that adds a number of instructions, as well as hardware features like clock generator, interrupt controller, timers, wait state generator, DMA channels, and external chip select lines. The 80188 is the same with an external 8-bit data bus.