Apple's purchase of Beats Music and Beats Electronics in a deal worth $3 billion is one of the largest acquisitions ever in the technology sector. Here are some other notable deals involving US tech companies, in order of dollar amount from smallest to largest
Facebook buys Instagram (April 2012)
Facebook offers $1 billion for hot smartphone photo-sharing service Instagram. The purchase of Instagram was Facebook's largest until the WhatsApp deal
Yahoo buys Tumblr (May 2013)
Former Google executive Marissa Mayer makes her biggest purchase since taking over as CEO of Yahoo, buying the popular blogging platform Tumblr for $1.1 billion
ebay buys PayPal (June 2002)
Online auction house eBay buys online payments firm PayPal for $1.5 billion
Google buys YouTube (October 2006)
Internet search giant Google buys online video platform YouTube in October 2006 from its founders, Steve Chen and Chad Hurley, for $1.65 billion
Facebook buys Oculus (March 2014)
Facebook announces a $2 billion deal to buy Oculus , a start-up behind virtual reality headgear
Google buys Doubleclick (March 2008)
The Internet titan seals the deal on its purchase of online ad tracking firm DoubleClick for $3.1 billion
Google buys Nest Labs (January 2014)
Google says it is buying smart thermostat start-up Nest in a deal valued at $3.2 billion , continuing its move into consumer electronics hardware
Microsoft buys Aquantive (May 2007)
Microsoft pays $6 billion for online advertising firm aQuantive. At the time, the price is deemed too high. Five years later, the tech giant takes a $6.2 billion writedown to reflect the slump in value of its online services division, largely related to the aQuantive deal
Microsoft buys Nokia (September 2013)
Microsoft buys the handset business of Nokia for $7.2 billion in an effort to catch up to rivals Apple and Google in the smartphone market
Oracle buys Sun (April 2009)
US business software giant Oracle buys struggling Sun Microsystems and its Java programming language for $7.4 billion
Microsoft buys Skype (May 2011)
Microsoft buys Internet voice and video leader Skype for $8.5 billion , the largest acquisition ever by the US software giant
Hewlett-Packard buys Autonomy (August 2011)
Hewlett-Packard buys British enterprise software company Autonomy for $10.24 billion. US authorities later open an investigation amid HP accusations that Autonomy had engaged in "accounting improprieties."
Google buys Motorola Mobility (August 2011)
Google buys the handset business of Motorola for $12.5 billion in a bid to challenge Apple in the smartphone market. Less than three years later, Google sold Motorola to China's Lenovo for $2.91 billion
Facebook buys Whatsapp (February 2014)
Facebook offers $1 billion for hot smartphone photo-sharing service Instagram. The purchase of Instagram was Facebook's largest until the WhatsApp deal
Hewlett-Packard buys Compaq - September 2001
US technology giant Hewlett-Packard buys Compaq Computer for $25 billion in a bid to compete with IBM