Class 1 may refer to: * Class I railroad, a term used in North American railroad size classification * Class 1 Touring Cars, an FIA classification for cars in motor racing * Class 1 World Powerboat Championship * Classes of U.S. Senators *

SCORE Class 1 SCORE Class 1 is an open-wheel unlimited-class that competes in the SCORE off-road race series including the Baja 1000, Baja 500, San Felipe 250 and the SCORE Desert Challenge. Class 1 is defined as an unlimited four-wheel single and two-sea ...

, unlimited off-road racing buggies * The first class in terms of hiking difficulty in the

Yosemite Decimal System The Yosemite Decimal System (YDS) is a three-part system used for rating the difficulty of walks, hikes, and climbs, primarily used by mountaineers in the United States and Canada. It was first devised by members of the Sierra Club in Southern Cal ...

* A contribution class in the National Insurance system in the UK * An IEC protection class in the electrical appliance manufacturing industry * A class in

laser safety Laser radiation safety is the safe design, use and implementation of lasers to minimize the risk of laser accidents, especially those involving eye injuries. Since even relatively small amounts of laser light can lead to permanent eye injuries, t ...

See also