A display device includes the following elements. An obtaining unit obtains a processing description and a processing state of each processing operation. A specifying unit specifies a processing state. A first display controller performs control so that a processing description of a processing operation belonging to the specified processing state is displayed in a first region. A second display controller performs control for each processing state so that an image reflecting the number of processing operations belonging to the corresponding processing state is displayed in a second region, and so that, if the number of processing operations belonging to a processing state that is not specified is changed, an image reflecting the changed number is redisplayed in a first mode and, if the number of processing operations belonging to a specified processing state is changed, an image reflecting the changed number is redisplayed in a second mode.