The 80x86 family was first started in 1981 with the 8086 and the newest member is the Pentium which was released thirteen years later in 1994. They are all backwards compatible with each other but each new generation has added features and more speed than the previous chip. Today there are very few computers in use that have the 8088 and 8086 chips in them as they are very outdated and slow. The number of 286 or 386 based computers around is declining as today's software becomes more and more demanding. Even 486's are being replaced by Pentiums. With the Pentium PRO and the MMX based CPUs Intel keeps increasing performance and features.