The Intel 80286 (officially called iAPX 286) is a 16-bit microprocessor that allows up to 16 megabytes of RAM. On DOS machines these can only be used via extended memory emulation. The Intel 8086 by contrast is only able to address 1 megabyte of RAM. The clock speed is between 6 and 20 MHz. Its successor is the Intel 80386. First released in 1982, the 286 was widely used in IBM PC compatible computers during the mid to late 1980s.