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Sept. 2: Intel Corp. agrees to buy the wireless-chip division of Germany’s Infineon Technologies AG for $1.4 billion.

Sept. 2: HP agrees to buy data-storage maker 3Par Inc. for $2.07 billion, ending a bidding contest with rival Dell.

Sept. 13: HP agrees to buy security-software provider ArcSight Inc. for about $1.5 billion.

Sept. 15: IBM says it has acquired OpenPages, a privately held software company that develops risk and compliance management systems, for undisclosed terms.

Sept. 20: IBM agrees to pay $1.7 billion for Netezza Corp., a company that helps businesses sort through data on corporate servers.

Sept. 27: IBM agrees to buy privately held Blade Network Technologies, a maker of software and technologies that route data to and from servers. Financial terms were not disclosed.

Nov. 2: Dell agrees to buy Boomi, whose AtomSphere software makes it easy for businesses to send data back and forth between Web-based applications and computer programs that run on PCs. Terms were not disclosed.

Nov. 3: Oracle Corp. agrees to buy e-commerce software maker Art Technology Group Inc. for $1 billion, to help businesses better understand people who shop with them online.

Nov. 15: EMC says it has reached a deal to buy Isilon Systems Inc. for $2.25 billion in cash to give EMC customers options for storing large amounts of data.