Graphic training aids (GTAs) are publications that assist during the conduct of training and the process of learning. Current Training Aids come in different forms, including models, displays, slides, books, pictures and media presentations. United States Army Graphic Training Aids, Field Manuals and other training media are produced by organizations such as the United States Army Training and Doctrine Command (TRADOC), the Army Training Support Center (ATSC), G3 and the Training Aids Service Center (TASC).