A printing apparatus to process a print job is provided. The printing apparatus includes a printing unit to form an image according to print data, a displaying device to display information concerning an operation of the printing apparatus, a first storage unit to store first user information, which identifies a user of an information processing apparatus, in association with a user-specific thumbnail image, which is to be displayed in the displaying device to identify the print job provided by the user, a first judging unit to determine as to whether the print job includes first security information, which is specified by the user to prevent contents of the print data from being disclosed, and the first user information, and a first display control unit to display the user-specific thumbnail image when the first judging unit determines that the print job includes the first security information and the first user information.