The cartoonist Peter is also known by the name ARNO, which is a four letter word. Peter is an American cartoonist and illustrator who has been creating cartoons since the 1970s. He is best known for his work in The New Yorker magazine, where he has been a regular contributor since 1978. He has also published several books of cartoons and illustrations. His work often features humorous takes on everyday life and has been praised for its wit and insight.