If you're looking for HP printer products look no further.  From here you can download HP's printer guide tool which shows all current printers and shows the previous model that the new one replaces.  It details the supplies, maximum paper weight/thickness and specifications.  It also shows discontinued printers.  You can compare printers side by side then then print a pdf for your reference.  Click here to get started.

Click here to view HP's latest Print and Imaging Guide.