EW

eW is a case-sensitive abbreviation that can refer to multiple, largely unrelated concepts depending on context. It does not denote a single organization or standard. In defense and security literature, the more common abbreviation is EW for electronic warfare, the umbrella term for operations that use the electromagnetic spectrum to monitor, disrupt, or deny enemy use of sensors, communications, and weapons. EW activities are typically categorized into electronic attack, electronic protection, and electronic support, and are integrated with other military capabilities.

In consumer technology and finance, eW can appear as a shorthand for e-wallet or digital wallet—a software-based system that stores payment credentials and enables electronic transactions. The term is more frequently written as e-wallet or digital wallet, but some marketing materials use "eW" as a stylized abbreviation.

In physics, the electroweak interaction is a fundamental force combining electromagnetism and the weak nuclear force and is usually abbreviated EW. The specific pairing "eW" is uncommon in formal scientific writing but may appear in notes or branding.

Outside these contexts, "eW" may be used decoratively to signify electronic or online origin in branding. Because capitalization matters in technical jargon, encountering "eW" typically signals the need to check context or source for intended meaning.