Epos
Epos or EPOS may refer to:

Science and technology
Electronic point of sale, technology which enables an efficient recording of the sale of goods or services to the customer
Embedded PowerPC Operating System, an IBM product
OpenEPOS, in the comparison of real-time operating systems

Organisations
Epos Ltd, a British loudspeaker manufacturer
Epos (watch manufacturer)
Emergency Physician Online Support, a group of physicians providing emergency medical services support
EPOS Audio, based in Denmark, part of Demant

Arts and entertainment
"Epos", a song by Zedd on Clarity
Elaine Paige on Sunday, a show on BBC Radio 2
Epic poem or epos

Other uses
Mikoyan-Gurevich MiG-105, also known as EPOS, a proposed Russian spaceplane
Epos (library ship), a floating library in Norway
Evektor EPOS, an electric-powered airplane
Husqvarna EPOS, a guidance system for robotic lawn mowers