This is a vintage 1990s PC personal portable computer software that I found at a Seattle area estate sale. It is a 1994 MATH-BLASTER MYSTERY The Great Brain Robbery-pre-algebra, Davidson Software, Windows (see pictures). It is in unused condition, New Old Stock, Factory Sealed-Cello Intact (see pictures). This vintage 1990s PC computer software package comes as shown in the pictures. Should be of interest to vintage 1980s-1990s PC software-user guides-parts-reference books-accessories-memorabilia & vintage Factory Sealed New Old Stock NOS Windows / Mac related collectors. Take a look at the pictures & e-mail me with questions. Buyer pays $7.90 USA shipping. I will combine the shipping for multiple sale buyers.