October was a busy month for mergers and acquisitions. The highlights include the largest technology acquisition in history, with Dell buying EMC (NYSE:EMC)Walgreens Boots Alliance (NASDAQ:WBA) and Rite Aid (NYSE:RAD) combining to form a drugstore behemoth, and Western Digital (NASDAQ:WDC) taking out SanDisk (UNKNOWN:SNDK.DL).

Click through the following slideshow to see an overview of five of the most important acquisitions that took place in October, including Pandora's (NYSE:P) entry into online ticket sales and the combination of snack-food companies Snyder's-Lance (NASDAQ:LNCE) and Diamond Foods (UNKNOWN:DMND.DL).

Timothy Green has no position in any stocks mentioned. The Motley Fool owns shares of and recommends Pandora Media. The Motley Fool owns shares of Western Digital.. The Motley Fool recommends VMware. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.