Category I can refer to:
*
Category I New Testament manuscripts - Alexandrian
*
Category-I Miniratna public sector undertakings (India)
*
Category I measurement - performed on circuits not directly connected to MAINS
*
Category I (a/b) protected areas (IUCN) - Strict Nature Reserve (Ia)/Wilderness Area (Ib)
See also
*
Class I (disambiguation) Class I may refer to:
* Class I antiarrhythmic
* Class I electrical appliance, a device constructed according to electrical grounding specifications in the IEC 60536-2 standard
* Class I bacteriocin, a type of toxin produced by some bacteria
*Clas ...
- 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 hypersens ...
- 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 O ...
- group/category equivalence (for labeling)
*
Category 1 (disambiguation) Category 1 can refer to:
*Category 1 cable, an electrical standard for communications wiring
* Category 1 tropical cyclone, on any of the Tropical cyclone scales
* Cat11egory 1 pandemic, on the Pandemic Severity Index, an American influenza pande ...
- Roman/Arabic numbering equivalence
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