Speech balloons are a graphic convention used most commonly in comic books, comics, and cartoons to allow words to be understood as representing a character's speech or thoughts. A formal distinction is often made between the balloon that indicates speech and the one that indicates thoughts; the balloon that conveys thoughts is often referred to as a thought bubble or conversation cloud.
Before the 20th century, speech was depicted using bands, flags, scrolls, or sheets of paper. The Annunciation to Saint Anne (1506) by Bernhard Strigel.
1775 cartoon printed in Boston
1783 James Gillray cartoon
In this 1807 political cartoon opposing Jefferson's Embargo, the form and function of speech balloons is already similar to their modern use.
A comic book, also called comicbook, comic magazine or simply comic, is a publication that consists of comics art in the form of sequential juxtaposed panels that represent individual scenes. Panels are often accompanied by descriptive prose and written narrative, usually, dialogue contained in word balloons emblematic of the comics art form.
Comic books on display at a museum, depicting how they would have been displayed at a rail station store in the first half of the 20th century.
A common comic-book cover format displays the issue number, date, price and publisher along with an illustration and cover copy which may include a story's title.
René Goscinny (1926–1977), writer of the Astérix comic book series.
Statue of Minnie the Minx, a character from The Beano, in Dundee, Scotland. Launched in 1938, The Beano is known for its anarchic humour, with Dennis the Menace appearing on the cover.