Apple is the largest public company in the world – with a market cap of $540 billion as of January 8, 2016 and annual revenues in 2015 of $234 billion. But how do you compare this to say the size of a country, typically measured as GDP? (GDP is a measure of annual value added, subtracting out inputs.) The FT made an estimate in early 2015 of $87 billion. This put Apple’s GDP between Ecuador and Slovakia, which each produced about $100 billion and Oman at $81 billion, Azerbaijan at $78 billion, and Belarus at $77 billion.