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After-hours buzz: Apple, IBM, Intel, Yahoo & more

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Check out which companies are making headlines after the bell Tuesday:

AAR - The provider of products and services to the aviation industry reported fourth-quarter earnings per share of 43 cents on $505.4 million in revenue. Estimates called for EPS of 41 cents on $510 million in sales. Shares slid in after-hours trading.

Apple - The iPhone maker is partnering with IBM to produce made-for-business applications. Shares of Apple rose in after-hours trading; IBM also gained.

Read MoreApple, IBM in massive enterprise hardware, software partnership

Trader on the floor of the New York Stock Exchange.
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Cintas - The supplier of work uniforms reported fourth-quarter earnings per share of 76 cents, excluding items, on $1.16 billion in revenue, versus estimates of EPS of 75 cents on $1.17 billion in sales. Shares fell in after-hours trading.

CSX - The rail service tallied second-quarter earnings per share of 53 cents on 3.24 billion revenue, versus expectations of EPS of 52 cents on $3.25 billion in sales. Shares edged lower in after-hours trading.

Google - Shares edged higher after news former Ford CEO Alan Mulally would join the search engine's board of directors.

Intel - The maker of computer chips posted second-quarter earnings per share of 55 cents on $13.83 billion in revenue. Analysts had expected EPS of 52 cents on $13.69 billion in sales. Shares rose in after-hours trading.

Yahoo - The online search engine reported adjusted second-quarter earnings per share of 37 cents, ex-TAC, on $1.04 billion in revenue, compared to expected EPS of 38 cents on $1.08 billion in sales. Shares rose in after-hours trading.

Read MoreYahoo enters deal with Alibaba to reduce shares it must sell

—By CNBC's Kate Gibson

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