The present invention provides a computer readable medium recording an information providing program for providing information relating to an optional device installable on an apparatus such as a printer, the program being capable of providing the information on an installable optional device that is presently uninstalled to a user in an easily understandable form. In the information providing program causing the information providing device to execute: acquiring information relating to the installation status of the optional device on the target apparatus and determining an uninstalled optional device, which is an installable optional device that has not been installed; determining whether the uninstalled optional device can be additionally installed in the installation status in the target apparatus; and displaying an image representing the uninstalled optional device to a user so that possibility or impossibility of the additional installing can be identified.