A printer driver program is disclosed that allows a host device to perform a printing instruction process for a plurality of models of printers. The printer driver program includes a program part that allows the host device to perform a process of holding product specification information provided from a manufacturer of the printers for each of the models and latest configuration information which is property information about each of the printers and is settable by a user, and a program part that allows the host device to perform a process of generating and displaying a user interface screen based on the product specification information and the configuration information relating to a selected printer in response to a request made by the user.