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OSLO EDU is a free Windows program with a reduced number of features compared to the Premium edition. It also restricts you to working with systems that have up to 10 surfaces. Although OSLO EDU does not include all the capabilities of OSLO, it does give you optical design power that exceeds many commercial programs. OSLO EDU gives you the basic ability to layout, edit, optimize, analyze, tolerance, and save a wide range of optical systems. OSLO EDU is perfectly tailored for educational use.