Ein

Ein or EIN may refer to:

Science and technology

• Ein function, in mathematics
• Endometrial intraepithelial neoplasia, a lesion of the uterine lining
• Equivalent input noise, of a microphone
• European Informatics Network, a 1970s computer network

Fictional characters

• Ein, a character in the anime series Cowboy Bebop
• Ein, a character in the video game series Dead or Alive
• Ein, the protagonist of the Game Boy Advance game Riviera: The Promised Land

Other uses

• Aer Lingus (ICAO code), the flag carrier airline of Ireland
• Eindhoven Airport (IATA code), in the Netherlands
• Employer Identification Number, assigned by the US Internal Revenue Service
• EPODE International Network, a Belgian obesity organization