Eas
Named as the FAA publishes it on its approvals.
Approved to make 2 classes of equipment. FAA spelling: EAS.
Equipment approvals technical standard order authorisations
TSO-C74C · Airborne Atc Transponder Equipment · * · instruments and avionics
TSO-C41C · Airborne Automatic Direction Finding (Adf) Equipment · * · other and general
Source: FAA Dynamic Regulatory System (type certificate data sheets, supplemental type certificates, parts manufacturer approvals, technical standard order authorisations). An organisation's name is as the FAA spelled it on each record; related spellings are separate pages.