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.
Class B Commercial Driverâs License (CDL) is required to drive a straight dump truck. Class B CDL allows you to drive heavy and tractor trailer trucks and buses. With a Class B license, youâre able to tow trailers less than 10,000 pounds of Gross Vehicle Weight Rating (GVWR).