<page_title> HP ProBook </page_title> <section_title> Timeline of releases </section_title> <table> <cell> 14" <col_header> Hewlett-Packard ProBook Release Timeline </col_header> </cell> <cell> s-series </cell> <cell> 4410s/4411s 4415s/4416s </cell> <cell> 15.6" <col_header> Hewlett-Packard ProBook Release Timeline </col_header> </cell> <cell> s-series </cell> <cell> 4510s 4515s </cell> <cell> 17.3" <col_header> Hewlett-Packard ProBook Release Timeline </col_header> </cell> <cell> s-series </cell> <cell> 4710s </cell> </table>
In 2009, HP introduced the ProBook s-series, which consisted of the 4410s, 4510s, and 4710s (14", 15.6", and 17.3" screens, respectively).