Editing CI (section)

==Science, technology and mathematics==
===Biology and medicine===
* [[cI protein]], a repressor protein of ''Enterobacteria phage λ''
* [[Cytoplasmic incompatibility]], a reproductive system
* [[Cardiac index]]
* [[Ci protein]], Cubitus interruptus -protein
* [[Coital incontinence]]
* [[Convergence insufficiency]]
* [[Corpulence index]]
* [[Cumulative incidence]], used as a measure of disease frequency in epidemiology
* [[Cochlear implant]]
* [[Chemical injury syndrome]], an increased sensitivity to common chemicals also called multiple chemical sensitivity.
* [[Chronic illness]], a condition that is long-lasting or recurrent
* [[Contraindication]]

===Computing===
* [[.ci]], the Internet country code top-level domain (ccTLD) for Côte d'Ivoire
* [[Common Interface]], for a Conditional Access Module
** [[CI+]], Common Interface Plus
* [[Computational intelligence]]
* [[Configuration item]], the fundamental structural unit of a configuration management system
* [[Core Image]], non-destructive image processing technology
* [[Continuous integration]], a software-engineering practice of merging developer code into a main code base frequently
* [[CodeIgniter]], a PHP framework

===Earth science===
* [[Cirrus cloud]]
* [[Convective instability]]

===Mathematics===
* [[Conditional independence]], a type of relation of random variables in probability theory
* [[Confidence interval]], an interval estimate of a population parameter used in statistics
* [[101 (number)]] (in Roman numerals)
* [[Compound interest]]
* [[Cosine integral]] (standard mathematical symbols "Ci" and "ci")

===Physics===
* [[Conical intersection]], the location of a discrete degeneracy between two electronic states
* [[Curie (unit)]] (Symbol: Ci), a measurement of radioactivity named after Marie Curie
* [[Copenhagen interpretation]], an interpretation of quantum mechanics
* [[Cubic inch]], a unit of volume

===Other uses in science and technology===
* CI group, a type of [[Carbonaceous chondrite#CI group|carbonaceous chondrite]] meteorite
* [[Carrier interferometry]], a radio and optical communication coding technology
* [[Chemical ionization]], a technique used in mass spectrometry
* [[Configuration interaction]], a post-Hartree–Fock method used in computational chemistry
* [[Contextual inquiry]],  a user-centered design research method
* [[Collective intelligence]], a subfield of sociology
* [[Colour Index International]], a reference database of CI numbers for dyes and pigments
* [[Bavarian C I]], a steam locomotive with the Royal Bavarian State Railways
* [[Compression ignition engine]], another name for a diesel engine