Europe is at a precipice, as voters across the continent have shown they are fed up with the existing political order and its prescription of austerity.

France's conservative government, led by Nicolas Sarkozy, was thrown out of power two weeks ago by Francois Hollande's left-leaning Socialist Party. Over the weekend, Angela Merkel's center-right Christian Democratic Union suffered its worst defeat in local elections since World War II. And Greece appears to be headed for a fresh general election, as its fractious political parties seem incapable of forming a coalition government.

For the first time, European leaders are even talking openly about a fissure in the continent's monetary union. Belgium's central bank president told the Financial Times: "I guess an amicable divorce -- if that was ever needed -- would be possible, but I would still regret it." And his Irish counterpart echoed the sentiment: "Things can happen that are not imagined in the treaties … but [a Greek exit] can be managed. … It is not necessarily fatal, but it is not attractive."

For investors, the significance of such an eventuality cannot be overstated. If the monetary union fractures, an epidemic of currency devaluations will almost certainly ensue, causing American-made goods to increase in price on a relative basis, thereby driving down the continent's demand for them. In the tech sector specifically, the following five companies will be among those feeling the biggest impact, as they all look to Europe for a considerable portion of their sales.

Company

European Exposure (Percent of Net Sales)

Market Cap (Billions)

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Oracle (Nasdaq: ORCL) 31% $134 Add
IBM (NYSE: IBM) 31% $230 Add
Apple (Nasdaq: AAPL) 26% $526 Add
Cisco Systems (Nasdaq: CSCO) 20% $90 Add
Intel (Nasdaq: INTC) 14% $136 Add

Sources: All geographic sales figures other than Apple's are from the respective companies' most recently filed quarterly reports. Apple's, which excludes sales from its retail division, are from the company's most recent annual report. In addition, both Oracle and IBM's European divisions include sales from the Middle East and Africa. Market-cap data is from Yahoo! Finance.

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