Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B) CEO Warren Buffett has mastered the art and science of value investing. He pays no attention to market trends, but insists on buying top-quality businesses with great leadership teams. Buffett's investing philosophy is steeped in old-school financial analysis and he reads 10-K filings for fun (and profit).

The Oracle of Omaha famously prefers business models so simple that a ham sandwich could run them. He originally aimed that quip at Coca-Cola (NYSE: KO), which sells water-based drinks to a human species that consists of roughly 60% water. It's like selling umbrellas in the rain, hawing ice pops at the beach, or marketing acorns to squirrels. Coke's business runs itself. It would take a lot of extremely poor decisions to mess it up. Coke is a robust cash machine with a generous dividend, currently yielding 3%. Buffett has held 400 million split-adjusted shares of Coca-Cola since 1994, not selling a single stub along the way. That's what a successful investment looks like in Warren Buffett's winning playbook.

Against that ultra-safe backdrop, it might surprise you to hear that Warren Buffett's company also makes plenty of investments in the tech sector -- and some of these high-tech purchases were incredibly farsighted. Here are two tickers from Berkshire's portfolio that might surprise you -- and could set you up for decades of wealth-building returns.

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Source Fool.com