The American Pit Bull Terrier (APBT) is a purebred dog breed recognized by the United Kennel Club (UKC) and American Dog Breeders Association (ADBA), but not the American Kennel Club (AKC). This type of dog, which was bred in the British Isles, became known as the bull and terrier. They arrived in the United States in the late nineteenth century where they became the direct ancestors of the American Pit Bull Terrier. For some time in the early part of the 20th century the UKC began to register the breed name with the word 'pit' in parentheses (American (Pit) Bull Terrier), to facilitate public acceptance as American Bull Terrier. For some time in the early part of the 20th century the UKC began to register the breed name with the word 'pit' in parentheses (American (Pit) Bull Terrier), to facilitate public acceptance as American Bull Terrier. But this lasted a short time and returned to the previous form.