Printers do have memory of what was printed, but the amount of memory varies depending on the model and make of the printer. For example, some HP printers have a dedicated printing history feature that stores information about every job sent to the printer. Other manufacturers include similar features in their firmware or driver settings. The main purpose of this storage is so that users can easily recall specific print jobs, or view a list of recently printed documents. However, it also means that your print history can be used to track what you have printed.