{{Use Oxford spelling|date=July 2024}} {{Wiktionary|CIO|cio}} '''CIO''' or '''cio''' may refer to: {{TOC right}} == Organizations == === Governmental organizations === * Central Imagery Office, an office of the US Department of Defense that was a predecessor of the National Geospatial-Intelligence Agency * Central Intelligence Office, the national intelligence agency of the former South Vietnam * Central Intelligence Organisation, the national intelligence agency of Zimbabwe * Corruption Investigation Office for High-ranking Officials, a government agency of South Korea
=== Non-governmental organizations === * {{lang|es|Centro de Investigaciones en Optica}}, a Mexican research centre in optics * Charitable incorporated organisation, a form of legal entity for non-profit organizations in the United Kingdom * {{lang|fr|Comité international olympique}} or International Olympic Committee, an international sports federation * Congress of Industrial Organizations or Committee of Industrial Organization, a 1935–1955 national trade union centre that merged into the AFL-CIO * Credit and Investments Ombudsman, an Australian dispute resolution service
== Titles == * Chairperson-in-office, an official of a member state holding the presidency of an international organization ** Commonwealth Chairperson-in-Office, an official of the Commonwealth of Nations * Chief information officer, the head of information technology * Chief innovation officer, the head of innovation, responsible for innovation management * Chief investment officer, the head of investments
== Other uses == * ''CIO'' (magazine), both print and online * Concurrent input/output, a feature in the JFS file system * Conventional International Origin, a conventionally defined reference axis of the pole's average location * "Cry it out", an aspect of the Ferber method for solving childhood sleep problems * City One station, Hong Kong, MTR station code
== See also == * {{lookfrom}} * {{in title}}
{{disambiguation}}