I0 or I-0 (the letter "I" followed by the digit "0", zero) may refer to:

• Axiom I0, a rank-into-rank axiom in set theory
• I-0 (video game), a piece of interactive fiction written by Adam Cadre

• IO (disambiguation) (the letter "I" followed by the letter "O")
• 10 (disambiguation) (the digit "1" followed by the digit "0")
• 1O (disambiguation) (the digit "1" followed by the letter "O")
• 0I (disambiguation) (the digit "0" followed by the letter "I")

Topics referred to by the same term

This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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