Reinvigorated technology player Yahoo! Monday unveiled a dusted-off design of its Flickr photo platform only hours after the company's dramatic acquisition of blogging site Tumblr. Yahoo chief executive Marissa Mayer, maintaining that her ambition was to make Flickr "awesome again," said the new site will showcase "bigger images" and create a user experience that is "more immersive, more expressive."

Reinvigorated technology player Yahoo! Monday unveiled a dusted-off design of its Flickr photo platform only hours after the company's dramatic acquisition of blogging site Tumblr. Yahoo chief executive Marissa Mayer, maintaining that her ambition was to make Flickr "awesome again," said the new site will showcase "bigger images" and create a user experience that is "more immersive, more expressive."

Yahoo has agreed to pay $1.1 billion to buy blogging forum Tumblr, ranking it in among the top 10 tech deals announced this year, according to research firm Dealogic. Here's a list of the top 10 tech mergers and acquisitions in 2013. Valuation is based on Dealogic's criteria and includes debt. 1. Dell Inc., to Silver Lake Management LLC (original bid), Feb. 5, 2013, $20.7 billion for 85 per cent of company. 2. Dell Inc., to Icahn Enterprises LP and Southeastern Asset Management Inc. (competing bid), March 25, 2013, $18.9 billion for 87 per cent of company.

Yahoo Inc. lured Marissa Mayer from Google in July to become its fifth CEO in as many years. Her task: Help the Internet pioneer regain its stature after years in a financial funk. In her 10 months leading the company, she has overseen a redesign of Yahoo services and orchestrated several acquisitions, including a deal to buy online blogging forum Tumblr for $1.1 billion. Here are some of the milestones on her watch: