Ontario has the oldest exit number system, having started posting exit numbers sequentially in the 1960s along Highway 401; it switched to mile-based numbering before Canada went metric. Most short freeways do not have exit numbers, and until about 2000 (with Highways 11 and 69/400), incomplete freeways also did not have exit numbers. Interchanges with multiple exits are lettered A-B.
Sometimes, when the user has multiple PDF forms with numerous pages associated with them. Then it becomes difficult for the user to manage the forms in an efficient way. Moreover, it creates a problem for the user to recognize pages & PDF forms from which the pages belong. Thus, it is needed to add page numbers to PDF forms for the easy identification of the PDF forms and pages under them. document numbering