RATP explained

RATP may refer to:

Transportation:

• RATP Group, or French: Régie autonome des transports parisiens, a public transport operator based in Paris, France
• RATP Iași (Romanian; Moldavian; Moldovan: Regia Autonomă de Transport Public Iași), a transit operator responsible for public transportation in Iași, Romania
• RATP Ploiești (Romanian; Moldavian; Moldovan: 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