The term 'HAIRDOS' is a collective term for buns, beehives, and bobs, which are all popular hairstyles. Buns are a classic style in which the hair is gathered into a knot at the back of the head. Beehives are a more voluminous style that involves backcombing the hair to create a tall, rounded shape. Bobs are a short hairstyle that is cut straight around the head. All three of these styles have been popular throughout history and remain fashionable today.