Abbreviations beginning with a

APTAAmerican Public Transportation Association
Community » Associations

APTAAssociation for Promotion of Tourism to Africa
Community » Travel & Tourism

APTAAssociation for the Preservation of Tennessee Antiquities
Community » Associations

APTAAustrian Platform for Telematics Application
Computing » Hardware

APTAAjax Pickering Transit Authority
Governmental » Authorities

APTAAlabama Police Trainer's Association
Governmental » Police

APTAAll Purpose Training Aid
Governmental

APTAAmerican Public Transit Association
Governmental » Transportation

APTAAmerican Public Transportation Association
Governmental » Transportation

APTAAngst, Pain, and Torture Association
Governmental » Police

APTAAmerican Physical Therapy Association
Medical » Therapy

APTAAgência Paulista de Tecnologia dos Agronegócios
Miscellaneous

APTAAlabama Physical Therapy Association
Miscellaneous

APTAAmerican Public Transit Association (now the American Public Transportation Association)
Miscellaneous

APTAAmerican Public Transportation Association (formerly the American Public Transit Association)
Miscellaneous

APTAAsia-Pacific Trade Agreement
Miscellaneous » Unclassified

APTAAssociação para Prevenção e Tratamento da Aids e Saúde Preventiva
Miscellaneous

APTAAssociation for the Preservation of Tennessee Antiquities
Miscellaneous

APTAAssociation of Private Tourism Agencies
Miscellaneous