Pi is the sixteenth letter of the Greek alphabet, representing sound. In the system of Greek numerals it has a value of 80. It was derived from the Phoenician letter Pe (). Letters that arose from pi include Cyrillic Pe, Coptic pi, and Gothic pairthra ().
The 3 types of commercial drivers are Class A, B, and C licenses. 1  Class A Commercial Driverâs License â Combination Vehicle permit holder can drive all commercial vehicles or a combination of commercial vehicles with a gross weight of 26,001 lbs. or more.
The Driverâs Licence Classification Chart shows you what class of licence you need to drive different types of vehicles. A licensed driver wishing to learn to operate a truck or tractor-trailer must hold a class G or higher driverâs licence and be accompanied by a driver who holds a valid class D or class A licence, respectively.