0K (zero K) or 0-K may refer to:

• 0k, an abbreviation for zero killed (used by bombers during World War II)
• 0K, an abbreviation for the temperature zero Kelvin, or Absolute zero
• 0K, an abbreviation for Zero knowledge in cryptology
  • Zero-knowledge proof
    • Non-interactive zero-knowledge proof
    • Zero-knowledge password proof
• 0K, an abbreviation for zero keel, a type of Suspension keel
• Zero-K, an open source real time strategy game
• Zero K, a novel by Don DeLillo
• Zero K, Music producer

See also[edit]

• All pages with titles containing 0-k
• All pages with titles containing 0k
• OK (disambiguation)