— October 2006: Announces $1.65 billion all-stock deal to buy video-sharing site YouTube Inc., one of the Internet’s rapidly rising stars.
— March 2006: Discloses purchase of Upstartle, maker of the online word processing program Writely, giving it another potential weapon in its escalating battle with Microsoft Corp. Purchase price was not revealed.
— January 2006: Agrees to buy dMarc Broadcasting Inc., which lets advertisers more easily schedule and deliver ads over radio and keep track of when they air, for at least $102 million in cash. The deal, which lets Google expand into advertising beyond the Internet, calls for Google to make additional payments of up to $1.14 billion over three years if performance targets are met.
— December 2005: Reaches agreement to pay $1 billion for a 5 percent stake in Time Warner Inc.’s online unit, renamed AOL LLC following close of the deal in early 2006. Deal thwarts Microsoft’s efforts to grab a larger piece of the booming Internet advertising market.
— October 2004: Announces purchase of Keyhole Corp., which combines mapping information with images collected from satellites and airplanes. Keyhole’s technology gets incorporated into Google Maps and Earth products. Purchase price was not revealed.
— July 2004: Announces purchase of Picasa, a developer of software for organizing digital photos on a computer, for undisclosed terms. Once sold for $29, Picasa now is free.
— April 2003: Announces acquisition of Applied Semantics, which develops, among other things, software for online advertising, strengthening Google’s ability to target ads. Terms were not disclosed.
— February 2003: Buys blog pioneer Pyra Labs and its Web site Blogger.com for an undisclosed sum, giving Google a foothold in a then-emerging format.
— September 2001: Announces purchase of the technology assets of Outride Inc., a Xerox Palo Alto Research Center spinoff that develops techniques for retrieving information online.
— February 2001: Announces purchase of Deja.com and its archives of Usenet discussion groups dating back to 1995, now part of Google Groups. Terms were not disclosed.