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Here is a summary of earnings reports for selected technology companies for the first quarter and what they reveal about the state of corporate spending:

• March 24: Boosted by a 21 percent increase in subscription revenue, Raleigh, N.C.-based Red Hat beat Wall Street expectations for revenues and profits in its fourth quarter

• April 13: Intel Corp. says net income nearly quadrupled, revenue up 44 percent. Intel says corporations are upgrading their employees’ computers and buying more servers.

• April 15: Advanced Micro Devices Inc. shows a 34 percent increase in revenue and says spending on servers is "pretty healthy." The microprocessor maker’s CEO says he is less certain about corporate spending on personal computers.

• April 15: Google Inc. says revenue surged 23 percent, its best rate since the summer of 2008. Prices paid for Google’s ads were 7 percent higher than the average rate at the same time last year.

• Monday: IBM Corp. reports net income gain of 13 percent, revenue up 5 percent. Revenue would have been flat without currency fluctuations but company predicts revenue will rise even without such adjustments in the current quarter.

• Tuesday: Apple said its net income in the most recent quarter jumped 90 percent, helped by strong iPhone and Macintosh computer sales.

• Tuesday: Durham, N.C.-based Cree reported “record” revenues and profits for the first quarter of the year, which is its third fiscal reporting period. Revenues soared 78 percent to $234 million compared to a year ago.

• Tuesday: Yahoo Inc. reports first revenue growth in 18 months. Although total ad revenue increased by just 3 percent, display advertising was up 20 percent. That category includes online billboards that companies use to promote brands.

• Wednesday: EMC Corp. reports net income up 92 percent and revenue up 23 percent. Company questions whether unusual spike in information-technology spending has already ended.

• Thursday: Microsoft Corp. says net income in the fiscal third quarter rose 35 percent. It credits strong sales of the newly released Windows 7, as the company benefits from an apparent rebound in business spending on technology after the economic downturn.

A look at telecom-industry earnings for 1Q

Here is a summary of earnings reports for selected telecommunications companies and what they reveal about the industry’s prospects:

• Wednesday: AT&T Inc. says it added a net 512,000 wireless customers under contracts during the first quarter. That’s down 43 percent from a year ago and represents the lowest increase since 2004. The numbers show that the saturation of the wireless market is even starting to catch up with the exclusive U.S. carrier of the popular iPhone, which had record sales in the first quarter, partly because of strong overseas markets.

• Thursday: Verizon Communications Inc. reported the lowest quarterly number of new wireless contract customers in nearly a decade: 423,000.

Among telecommunications companies’ earnings coming up:

• April 28: Sprint Nextel Corp.

• May 5: Qwest Communications International Inc., CenturyTel Inc.

• May 6: MetroPCS Communications Inc., Leap Wireless International Inc.