Ketchup is a table condiment or sauce. The unmodified term now typically refers to tomato ketchup. Ketchup is generally made from tomatoes, sweetener, vinegar and assorted seasoning and spices.
Legend has it that Henry John Heinz in 1876 invented ketchup by adapting a Chinese recipe for so-called Cat Sup, a thick sauce made from tomatoes, special seasoning and starch. Food engineer Werner Stoll of the Heinz company is positive: "H.J. Heinz invented ketchup.