What Are the Biggest Tech IPOs in History?

May 6 (Bloomberg) -- From the railway to the information superhighway, in today's "The Big Question," Bloomberg's Willem Marx looks at the biggest share offerings in U.S. history, covering more than a century from the Union Pacific Railroad to Alibaba's upcoming IPO.

Shakeup: Samsung Replaces Mobile-Unit Chief
19:54 - Samsung replaced the executive overseeing its mobile-phone business as the company tries to protect a dwindling sales lead against Apple and Chinese makers. Bloomberg's Jungah Lee reports on "Trending Business." (Source: Bloomberg)
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