Short answers, pulled from the story.
Walt Disney Productions developed the storyboard process in the early 1930s. The first complete storyboards were created for the 1933 Disney short Three Little Pigs according to Diane Disney Miller.
Dick Huemer credited Ted Sears with inventing the storyboard while working at Fleischer Studios. Sears then switched to working for Walt Disney Productions and introduced the concept to Walt Disney.
Gone with the Wind released in 1939 was one of the first live-action films to be completely storyboarded. William Cameron Menzies served as the film's production designer hired by producer David O. Selznick to design every shot.
An animatic is a sequence of still images displayed in sync with rough dialogue or rough soundtrack to provide a simplified overview of visual and auditory elements. Animators and directors use this process to work out screenplay, camera positioning, shot list, and timing issues.
Design comics were popularized by Kevin Cheng and Jane Jao in 2006 at the Information Architecture Summit wrapup. These design comics include a customer or other characters into a narrative to illustrate product-use scenarios during design.