Category 1 can refer to:
*
Category 1 cable Category 1 cable, also known as Cat 1, Level 1, or voice-grade copper, is a grade of unshielded twisted pair cabling designed for telephone communications, and at one time was the most common on-premises wiring. The maximum frequency ...
, an electrical standard for communications wiring
* Category 1 tropical cyclone, on any of the
Tropical cyclone scales
* Category 1
pandemic
A pandemic () is an epidemic of an infectious disease that has spread across a large region, for instance multiple continents or worldwide, affecting a substantial number of individuals. A widespread endemic (epidemiology), endemic disease wi ...
, on the
Pandemic Severity Index, an American influenza pandemic with a case-fatality ratio of less than 0.1%
* Category 1 winter storm, on the
Northeast Snowfall Impact Scale and the
Regional Snowfall Index
** Any of several winter storms listed at
list of Northeast Snowfall Impact Scale winter storms
*
Category 01 non-silicate mineral - native element minerals
See also
*
Class 1 (disambiguation) 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/category equivalence (for labeling)
*
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 ...
- type/category equivalence (for labeling)
*
Group 1 (disambiguation) Group 1 may refer to:
* Alkali metal, a chemical element classification for Alkali metal
* Group 1 (racing), a historic (until 1981) classification for Touring car racing, applied to standard touring cars. Comparable to modern FIA Group N
* Group ...
- group/category equivalence (for labeling)
*
Category I (disambiguation) - Roman/Arabic numbering equivalence
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