Learn how to make a pop-up card for Christmas with this easy and creative DIY Christmas greeting card tutorial! Using simple materials like paper, scissors, and glue, you'll craft a festive 3D ...

Sorting punch cards had mathematical uses. In the late 1920s, number theorist Derek N. Lehmer of the University of California at Berkeley developed a set of punched stencils to assist in factoring ...

Description This red, cloth-covered paper box holds a set of 272 punched cards as well as two punch cards which have not been punched. On the top row of each card is printed, the exclusion modulus, ...