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
The 100 seats in the United States Senate are divided into three classes for the purpose of determining which seats will be up for election in any two-year cycle, with only one class being up for election at a time. With senators being elected t ...
*
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
* 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
*
Class I (disambiguation)
*
Class 01 (disambiguation)
*
First class (disambiguation)
*
NSB El 1
NSB El 1 is the first electric locomotive series used by the Norwegian State Railways, from 1922 until 1973. Twenty-four engines were delivered from ASEA and Thune, twenty-two in 1922 and two in 1930. Based on the German DB E 71 and Swedish SJ O ...
, an electric locomotive of Norway
*
NSB Di 1, a diesel locomotive of Norway
*
Type 1 (disambiguation) Type 1 or Type I or ''variant'', may refer to:
Health
*Diabetes mellitus type 1 (also known as "Type 1 Diabetes"), insulin-dependent diabetes
* Type I female genital mutilation
* Type 1 personality
*Type I hypersensitivity (or immediate hypersensit ...
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