To be a trainee of three outstanding and leader air reservation systems in the world and basically in the Middle East region; Amadeus, Sabre, and Galileo; is good. To be a trainer for training mode using simulations/applications of these systems at labs of University of Jordan in Jordan, Fayoum University in Egypt, and Pioneer Academy in Jordan; is better than the former. To be a trainer for the three systems on the production mode in Royal Jordanian and other travel agencies in Jordan, and the Travel Agency of the Fayoum University  is the best of all. During training and practicing of this great and rich experience, the researcher recognized many areas of difficulty that trainees give complaints about. However, trainers can exclude some of them without any distortion of information provided.  In this study, based on own elaboration from training experience- this research tries to shed light on some areas that may have much difficulty especially for debutant trainees. The research’s methodology principally depends on the techniques of selfbrainstorm, self-observation, and self-recording for the teaching and training experience.  The current study points out some obstacles in training and working on Amadeus, Sabre, and Galileo reservation systems. Also the research proposes a workable approach with items ordered in a logical sequence to training especially beginners.  Finally, the study advises the holding companies of the three systems to redesign and provide their products and materials in simple and uniform packages by using either the cryptic or graphical mode through all of the system's versions and all of soft and hard editions of it in all headquarters geographical areas of the world. Other advices for trainers and trainees are existed.    

Key Words: Amadeus, Sabre, Galileo, Training Mode, Production Mode, Training Simulation