E0

E0 or E00 can refer to :

• ε₀, in mathematics, (epsilon naught), the smallest transfinite ordinal number satisfying ${\displaystyle \varepsilon _{0}=\omega ^{\varepsilon _{0}}}$
• ε₀, in physics, vacuum permittivity, the absolute dielectric permittivity of classical vacuum
• E0 (cipher), a cipher used in the Bluetooth protocol
• E0 (robot), a 1986 humanoid robot by Honda
• E^o, in electrochemistry, the standard electrode potential, measuring individual potential of a reversible electrode at standard state
• E0, the digital carrier for audio, specified in G.703
• E0, Eos Airlines IATA code
• E0, ethanol-free gasoline, see REC-90
• e₀, in demographics, the life expectancy of an individual at birth (age zero)
• E00, Cretinism ICD-10 code
• E00, ECO code for certain variations of the Queen's Pawn Game chess opening
• Enemy Zero, a 1996 Japanese horror video game for the Sega Saturn