The letters CAO are used to denote several things:

• Central Applications Office - Irish organisation that oversees tertiary education applications
• Chief Administrative Officer of a company
• Chief Accounting Officer of a company
• Collectieve Arbeids Overeenkomst (Collective Work Agreement), Dutch term for a collective employment contract framework
• Computer Aided Optimization
• Computer Assisted Ordering - See barcode
• Calcium Oxide - CaO

In addition to being a TLA, Cao is also a Chinese surname, with perhaps the most famous bearer being Cao Cao. The Central Applications Office (CAO) is the organisation responsible for overseeing most undergraduate applications in the Republic of Ireland, the Postgraduate Applications Centre is a related organisation that oversees some taught postgraduate courses. ... Students attend a lecture at a tertiary institution. ... A chief administrative officer (or CAO) is a corporate officer responsible for management of the personnel of the corporation. ... CAO is the bizspeak acronym for Chief Accounting Officer. ... An employment contract is an agreement entered into between an employer and an employee at the commencement of the period of employment and stating the exact nature of their business relationship, specifically what compensation the employee will receive in exchange for specific work performed. ... Wikipedia encoded in Code 128-B Wikipedia encoded in Code 128b Wikipedia encoded in Code 93 Wikipedia, the free encyclopedia encoded in the DataMatrix 2D barcode Wikipedia, The Free Encyclopedia in multiple languages encoded in the DataGlyph 2D barcode A barcode (also bar code) is a machine-readable representation of... Calcium oxide (CaO), commonly known as lime, quicklime or burnt lime, is a widely used chemical compound. ... The TLA (three-letter acronym or three-letter abbreviation) is a TLA and is the most popular type of abbreviation in technical terminology, and is also very common in general language. ... Cao Cao (曹操; Pinyin: Cáo Cāo) (155 – 220), whose name is also often transliterated and should be correctly pronounced as Tsao Tsao, was a regional warlord and the last Chancellor of Eastern Han Dynasty who rose to great power during the last years of the Eastern Han...