The Lord's Prayer is a Christian prayer that is recited by many believers. It is also known as the Our Father, PATER Noster, and the Paternoster. The three-letter acronym for the Lord's Prayer is PATER, which stands for 'Prayer of the Father'. The five-letter acronym is PATERNOSTER, which is derived from the Latin phrase 'PATER Noster' meaning 'Our Father'. The full name of the prayer is the Lord's Prayer, which is a petition to God for guidance, protection, and blessings.