FILE - In this file photo taken Jan. 13, 2011, the IBM logo is displayed. IBM Corp., reports quarterly financial results Monday, July 18, 2011, after the market close. (AP Photo/Seth Wenig, file)

SAN FRANCISCO (AP) — IBM has raised its full-year profit guidance and says its quarterly earnings rose 8 percent on increases in each of its three major product categories.

The results show the strength of the 100-year-old company's efforts to link its mainframes and other computing hardware with the software and services that now bring in the bulk of IBM's profits.

Net income was $3.66 billion, or $3 per share, compared with $3.39 billion, or $2.61 per share, a year ago.

Excluding items, IBM earned $3.09 per share, ahead of the $3.02 per share analysts expected.

Revenue increased 12 percent to $26.7 billion, ahead of the $25.4 billion analyst estimate.

Guidance for 2011 calls for at least $13.25 per share, excluding items, up from the previous estimate of $13.15 per share.

IBM's stock rose $4.42, or 2.5 percent, to $179.70 in extended trading after the release of results Monday. In the regular session earlier, the stock fell 26 cents to $175.28.

Featured Video

Lois Lerner Invokes the Fifth Amendment

Lew: Tax System 'Has to be Within the IRS and Apart From Politics'

GOP Lawmakers: IRS Scandal Shows That Tax Agency Should Not Be in Charge of Enforcing Obamacare