Ecco may refer to:

• an imprint of the multinational publisher, HarperCollins.
• the Danish shoe manufacturer, ECCO.
• the Earth Coincidence Control Office, a concept of super intelligent entities described by John C. Lilly. Compare with VALIS.
• the European Council of Conscripts Organisations
• the Ecco The Employment Agency - an employment agency.
• a misspelling of Italian writer Umberto Eco's surname.
• Ecco & Miramont (a "packaging & labels" company).
• the Ecco Pro software package.
• Encyclopedia of Chinese Chess Openings
• the East Calhoun Community Organization, the neighborhood organization for East Calhoun, a neighborhood in Minneapolis, Minnesota.
• Ecco the Dolphin, a video game
• Nestlé Ecco, a barley, rye and chicory-based beverage.
• An ECCO (Evaluation of Capital Creation Options) model of an economy is uses the stocks-and-flows paradigm (aka system dynamics) to track energy and other natural capital flows through the economy. ECCO models were first developed by Malcolm Slesser et al. in Edinburgh in the late 1990s.

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