RATP

RATP may refer to:

Transportation:


 * RATP Group, or Régie autonome des transports parisiens, a public transport operator based in Paris, France
 * RATP Iași (Regia Autonomă de Transport Public Iași), a transit operator responsible for public transportation in Iași, Romania
 * RATP Ploiești (Regia Autonomă de Transport Public Ploiești), a transit operator responsible for public transportation in Ploiești, Romania

Computation:


 * Reliable Asynchronous Transfer Protocol (RATP), defined in RFC 916