This study uses the Technology Acceptance Model (TAM) as a basic theory to address the factors that affect students' acceptance of using the OLAT (Open Learning and Training) system in an Egyptian vocational education school. System quality and self-efficacy were incorporated as an extension to TAM in the research model. The data was analyzed by Partial Least Squares (PLS). The results show that perceived ease of use is the main variable linking external variables with perceived usefulness, attitude, and system usage. Moreover, it was found that the research model explained 66% of the variance in perceived ease of use, 80% of the variance in perceived usefulness, and 81% of the variance in attitude toward using OLAT.