The Math Blaster Plus user manual, published by Davidson's in 1990, is a vintage computing merchandise item sourced from the United States. This manual is specifically designed for the Math Blaster Plus software, offering detailed instructions and guidance for users to navigate and use the program effectively. Perfect for collectors or retro computing enthusiasts, this manual provides valuable insights into the operation and functionality of the software, making it a valuable addition to any vintage computing collection._-_-_-_-. item is in used condition. If you have any questions about this item please ask. No refunds or returns. Please pay within two days so I can ship this item as fast as possible. Thanks for looking and please check out my other items for sale. I usually sell vintage items. Thanks