Abstract: This invention relates to a leader for use in processing lengthy strips of continuous business forms assemblies. The leader includes feeding means complemental to that of the forms assemblies and one or more transverse areas of pressure-sensitive adhesive for temporary positive attachment, one edge portion being applicable to detachment and application over the leading edge of the endmost portion of the form assembly and the other to a major body portion of the assembly. The leader may also have several other embodiments such as a folded portion for attachment to the forms leader edge. The leader is especially applicable to initiating data processing operations of forms assemblies on printers of various feeding types.