The Charleses' Dog is the name of a beloved pet owned by a fictional family called the Charleses. The dog's name is ASTA, which is a four-letter word that can be found in crossword puzzles. ASTA was featured in several films and television shows, including the 1934 film adaptation of the novel The Thin Man. ASTA was known for his intelligence and loyalty, and he was often seen accompanying the Charleses on their adventures.