PTT

• Postal Telegraph and Telephone (several);
• Postal Telephone and Telegraph (several);
• Public Telegraph and Telephone (several);
• Public Telephone and Telegraph (several);
• Post Telefon Telegraph (Germany);
• Poste, Téléphone et Télécommunications (France);
• Ministry of Post, Telegraph and Telephone (Iran);
• Part task trainer (military);
• Partial thromboplastin time;
• Partido Trabalhista Timorense;
• Polytrimethylene terephtalate;
• Protein truncation test;
• Push to talk.