Prototyping serves to provide specifications for a real, working system rather than a theoretical one. In some workflow models, creating a prototype (a process sometimes called materialization) is the step between the formalization and the evaluation of an idea. A User Experience Prototype captures enough aspects of the intended design that it can support user research. 2  A Visual Prototype captures the size and appearance, but not the functionality, of the intended design.
In the mid-1930s, the last main improvement to the leather football helmet was introduced: The facemask. Vern McMillan, who owned a sporting goods store in Terre Haute, Indiana, was credited with inventing the first facemask design.
Since 1955, the official NFL footballs have been made at the Wilson factory in Ada, Ohio. Each football is handmade from cowhide sourced from Kansas, Nebraska, and Iowa.ootball fans often perpetuate the idea that footballs used to be made of pigskin, which is how they got their nickname, but it turns out this isn't the case. In fact, pigskins were originally made out of animal bladdersâsometimes the bladder of a pig, which is thought to be how the moniker pigskin came about.