A0

A0 stands for:

• A0, lowest level of difficulty in technical climbing, see difficulty scale (climbing) #Technical climbing
• A0 value, a standard for washer-disinfectors, see EN ISO 15883
• DIN A0, a standardized paper format, see paper format overview
• The Dragon (astronomical object) , as an earlier name

${\displaystyle a_{0}}$ stands for:

• Bohr radius

See also:

• AO

This is a disambiguation page for differentiating between several terms identified with the same word.