Microsoft Corp agreed to buy LinkedIn Corp for $26.2 billion in its biggest-ever deal, combining the software giant's fast-growing cloud services business with the world's largest online network for professionals. List is huge deals are as follows: Dell to buy EMC for $67 billion; Avago Technologies Ltd. buys Broadcom Corp. for $37 billion in 2016; Facebook buys WhatsApp for about $21.8 billion in 2014; Hewlett-Packard Co. buys Compaq for about $19 billion in 2002; Symantec Corp. buys Veritas fo [...]