Intel 80186 microprocessor, sometimes called i186, is an enhanced version of Intel 8086 16-bit processor. Being completely object code compatible with the 8086, the 80186 integrated many system components into one chip, added 7 new instructions, and added new operand types to three existing 8086 instructions. With the exception of integrated components, the Intel 80186 microprocessor is not very different from the 8086, and, because of this, the 80186 may be considered as an embedded version of 8086.
Fujitsu was one of the lesser known second sources.