Umberto Eco, an author

Eco, now defunct 24-hour Spanish-language cable news network, owned and operated by Televisa Televisa

CodeGear ECO, Enterprise Core Objects™

Enterprise Core Objects, powerful Model-Driven Architecture implementation from Borland^® with object-relational mapping and other capabilities.

Economic Cooperation Organization, an international organization involving ten Asian nations

Engineering Change Order: is used for changes in documents such as processes and work instructions.

Encyclopaedia of Chess Openings, a scheme to classify chess openings

Eco, a character, played by Jaqueline Duncan, on the children's show The Shak

Eco (computer game), a computer simulation game

Eco (currency), a proposed currency

Environment and Conservation Organisations of Aotearoa New Zealand

Earth Summit ( aka Eco 92 ), an international conference on environment (held in 1992, Rio de Janeiro)