The American Shorthair descends from European cats that traveled with early settlers to North America, where they earned their keep controlling rodents on ships and farms. In the early 1900s the sturdiest of these working cats became a recognized breed, first shown as the Domestic Shorthair and renamed in the mid-1960s. Today it's a solid, muscular cat with a broad face, full cheeks and a dense, hard-textured coat in many colors, the silver tabby being the classic.
Many American Shorthairs are easygoing and quietly affectionate, happy to supervise from a nearby chair. Personality still depends on history and socialization more than breed. Shorthaired shelter cats are often random-bred domestic shorthairs with the same look and similar traits, so a cat doesn't need papers to share the breed's easy ways.