Obviously the early success was down to the dominance of their Windows operating system but more recently the focus has been on building cloud computing systems via Azure which will involve a lot of capital expenditure - over $15bn in the past year. This level of spending cannot be matched by many others - Amazon and Google are the main competitors - which should give the company a big advantage or 'moat' in the future.
Climate & Environment
|(click to enlarge)|
(Since posting, this Guardian article provides an interesting overview)
|3 Yr Comparison v S&P 100 Index|
(click to enlarge)