The WABAC Machine is a fictional time machine from the animated television series The Adventures of Rocky and Bullwinkle. It allows characters to travel back in time to various historical events and moments. The name "WABAC" is a playful acronym that stands for "Wayback," emphasizing its purpose of taking users to the past. In the show, the WABAC Machine is operated by the character Mr. Peabody, a highly intelligent dog. He uses the machine to teach his young friend Sherman about history and important figures, making learning fun and engaging through their adventures.