US President Barack Obama has just a few months to go before he leaves office after two terms in the White House.

For President's Day 2016, ZDNet takes an (updated) look back at all the technology that has kept and continues to keep the leader of the free world ticking over -- from his first day in office in 2009 to the present day. From smartphones to computers, tablets and automotive tech, we explore the varied technological tastes (and in some cases, "obligatory tech") from the most tech-savvy head of state to ever sit in the Oval Office.

And, just to make things interesting, we look around the White House to see what else springs up and helps the President carry out his daily duties.