In the mid-1980s, as computers found their way into homes across America, they made their way into locomotives as well. In 1982, a year after IBM debuted its Personal Computer, General Electric fielded its first computerized diesel, test unit No. 606. With microprocessors controlling its engine and other systems, including a MicroSentry Adhesion System for wheelslip control, No. 606 and its counterparts at EMD ushered in the third generation of diesel power. By the end of the decade, the typical American road diesel would be profoundly different both inside and outside - evolving from a four-axle hood unit with a narrow short nose and electronic controls to a high-horsepower, six-axle computerized heavy hauler with a wide "North American" cab.