Tech earnings are about to flip the switch all the way up to 11. Tomorrow, three of the Dow Jones Industrial Average's (INDEX: ^DJI) five tech stocks are on tap to report earnings after the bell. Much like how banking has been in the spotlight across the past week, tomorrow night technology should steal the show. Let's take a peek at who's set to announce earnings after the bell tomorrow.

Company

Expected Earnings Per Share

Last Year's Earnings Per Share

Expected Growth Rate
Google $10.49 $8.75 19.9%
Intel (Nasdaq: INTC) $0.61 $0.59 3.4%
Microsoft (Nasdaq: MSFT) $0.76 $0.77 (1.3%)
IBM (NYSE: IBM) $4.62 $4.18 10.5%

Source: Thomson Reuters. Earnings per share are adjusted estimates.

We have four respective bellwethers encompassing most of technology. There's Microsoft and Intel, which give a good view into how PC growth (or lack thereof) is holding up. Google will give a view into Internet services and could give further analysis of how its mobile efforts are shaping up. Then there's IBM, which covers the business spending side and could shed a light -- along with Intel -- on whether emerging-market spending has dropped off.

Between the four, investors will get a great cross-section for how technology spending held up last quarter. Together they account for a market cap of nearly $800 billion, or one-third the value of all technology companies in the S&P 500.

Looking at expected quarterly earnings, one thing is clear: Tech is feeling the effect of the global slowdown. Microsoft is expected to see its adjusted earnings per share fall after seeing growth of 33% two quarters ago. Last quarter, Intel saw its earnings jump 25% but expects anemic growth rates this quarter. Part of the reason for these slowdowns is floods in Thailand that ravaged the computer supply chain, but that doesn't fully explain the level of slowdown.

That slowdown is where one final piece of the "technology puzzle" might come into play. I'm talking about the technology titan that's nearly the size of Google and IBM combined: Apple (Nasdaq: AAPL). The company reports Jan. 24, and expectations for a blowout quarter are high. The company is expected to sell north of 30 million iPhones and more than 13 million iPads in addition to continuing growth in its Mac lineup. Apple's quarter will not only be a better barometer of consumer rather than business technology spending, but it'll also give an improved feel for how much technology spending is transitioning away from traditional spending areas like PCs and into mobile devices.

In any case, buckle up, because tomorrow should reveal quite a bit about the health of the technology world.

If you're on the hunt for a great stock idea in the tech sector that's a leader in technology's most important trend in decades, The Motley Fool has a just released free report on mobile named "The Next Trillion-Dollar Revolution" that details a "hidden" component play inside mobile phones that also is a market leader in the exploding Chinese market. Inside the report we not only describe why the mobile revolution will dwarf any other technology revolution seen before it, but we also name the company at the forefront of the trend. Hundreds of thousands have requested access to previous reports, but you can be among the first to access this just-released report -- and it's free.