Class A

Class A may refer to:

Communications technology

 * Class-A amplifier, a category of electronic amplifier
 * Class A network, in Internet technology, a type of large network
 * Class A television service, a system for regulating low power stations in the United States

Sports

 * Class A (baseball), a level of American Minor League Baseball
 * Class A (classification), a Paralympic wheelchair fencing classification

Transportation

 * Class A airfield, a type of World War II British military installation
 * Class A surface, in automotive design
 * Milwaukee Road class A, a class of steam locomotives
 * Norfolk and Western Railway class A, a class of steam locomotives
 * Class A, a type of commercial driver's license in the United States
 * Class A, an ICAO airspace class
 * Class A, a type of motorhome

Other uses

 * Class A (novel), a 2004 CHERUB novel by Robert Muchamore
 * Class A drug, a classification of drugs controlled by the UK Misuse of Drugs Act
 * Class A office space, a Building Owners and Managers Association category
 * Library of Congress Classification:Class A -- General Works
 * Class A, a stellar classification
 * Class A, a retired type of United States Army Service Uniform
 * Class A foams, a type of foam used in firefighting