The Montgomery Ward Catalog was a publication which contained a list of items which could be purchased from Montgomery WardWP, an American department store in operation from the 19th century.
While working with Kes on constructing a 19th century windmill on the USS Voyager's holodeck, B'Elanna Torres suggested that Kes could order the sheet-metal blade wheel for the windmill from the catalog. (VOY short story: "Winds of Change")