Editing Baseball card (section)

==Classification: the type card==
Since early baseball cards were produced primarily as a marketing vehicle, collectors began to classify those cards by the 'type' of company producing the set. The system implemented by Jefferson Burdick in ''[[The American Card Catalog]]'' has become the ''de facto'' standard in identifying and organizing trade cards produced in the Americas pre-1951. The catalog itself extends into many other areas of [[collecting]] beyond the sport of baseball. Sets like 1909–1911 White Borders, 1910 Philadelphia Caramels, and 1909 Box Tops are most commonly referred to by their ACC catalog numbers ([[T206]], E95, and W555, respectively).