Without a doubt, (NASDAQ: AAPL) is one of the best businesses in the world. And even Warren Buffett recognizes this as Berkshire Hathaway currently has a stake in the tech giant worth $179 billion. Buffett initially bought shares of Apple in the first quarter of 2016.

But if you were smart enough to invest $1,000 in Apple stock at the start of the year 2000, you'd be sitting on a monster gain of 21,230%. This means that modest investment would be worth a whopping $213,000 today (as of July 27). 

Let's take a closer look at the key product and service introductions that helped drive Apple to its current market capitalization of over $3 trillion, making it the most valuable company on the planet.

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Source Fool.com