Enhance your brain fitness with the Posit Science Brain Fitness Program Classic CDs. These CDs are compatible with both PC and MAC operating systems, making them accessible to a wider audience. The program includes a range of exercises designed to improve cognitive function, memory, and processing speed. Perfect for those looking to improve their brain fitness in a fun and interactive way. The Posit Science Brain Fitness Program Classic CDs are a must-have for anyone looking to enhance their cognitive abilities.