GATS ONCE is a powerful computer software application handling carefully the financial department activities and Airline Tickets Accounting, Tourism Files Accounting, Journey Files Accounting, Account Receivable & Payable, Tourism Transports Accounts, Fixed Assets Depreciations, Budget Financial Plan, Tickets Accounting and Financial Statements Reports. GATS ONCE designed for travel agent companies or a group of sister companies. With this amount of information the system will collect, organize, and output detailed and summary reports with the least effort from the user.