Dell to buy EMC for $67 billion: The 22 biggest acquisitions in tech history

A long list of the biggest acquisitions in the history of technology companies:

1. Dell to buy EMC (October 2015)

Computer maker Dell said it had agreed to buy data storage company EMC in a $67 billion record technology deal that will unite two mature companies and create an enterprise tech powerhouse.

2. Hewlett-Packard buys Compaq (September 2001)

US technology giant Hewlett-Packard buys Compaq Computer for $25 billion in a bid to compete with IBM.

3. Facebook buys WhatsApp (February 2014)

The world's biggest social network Facebook bets big on mobile with an eye-popping cash-and-stock deal worth up to $19 billion for smartphone messaging service WhatsApp.

4. Intel buys Altera (June 2015)

Intel buys Altera for $16.7 billion as the world's biggest chipmaker seeks to make up for slowing demand from the PC industry by expanding its line-up of higher-margin chips used in data centers.

5. Nokia buys Alcatel-Lucent (April 2015)

Nokia acquires Alcatel-Lucent in an all-share deal that values its smaller French rival at 15.6 billion euros ($16.6 billion), building up its telecom equipment business to compete with market leader Ericsson.

6. Google buys Motorola Mobility (August 2011)

Internet search giant 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.

7. Hewlett-Packard buys Autonomy (August 2011)

US technology giant 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."

8. 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.

9. Oracle buys Sun (April 2009)

US business software giant Oracle buys struggling Sun Microsystems and its Java programming language for $7.4 billion.

10. Microsoft buys Nokia (September 2013)

Microsoft buys the handset business of former market leader Nokia for $7.2 billion in an effort to catch up to rivals Apple and Google in the smartphone market.

11. 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.

12. 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.

13. Google buys DoubleClick (March 2008)

The Internet titan seals the deal on its purchase of online ad tracking firm DoubleClick for $3.1 billion. (AFP)

14. Apple buys Beats Music (May 2014)

Apple purchased Beats Music and Beats Electronics in a deal worth $3 billion.

15. Lenovo buys Motorola (January 2014)

China's Lenovo Group acquires the Motorola handset unit from Google for $2.91 billion.

16. Microsft buys Mojang (September 2014)

Microsoft acquires the Stockholm-based developer of the wildly popular Minecraft video game for $2.5 billion.

17. Facebook buys Oculus (March 2014)

Facebook announces a $2 billion deal to buy Oculus, a start-up behind virtual reality headgear.

18. 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.

19. SanDisk buys Fusion-io (June 2014)

US computer storage company SanDisk acquired rival flash memory firm Fusion-io for $1.6 billion.

20. eBay buys PayPal (June 2002)

Online auction house eBay buys online payments firm PayPal for $1.5 billion.

21. 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.

22. Facebook buys Instagram/b> (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.