The World’s Most Powerful Supercomputer Is Still in China

What the top American machine lacks in raw power, it makes up for in efficiency.

SAP Vaults Into Top Three E-Commerce Players With Hybris Buy

Buying into a market where it struggled before.

HP’s Future, ESPN’s March Madness and Jerry Yang Strikes Back: The AllThingsD Week in Review 3/17/13 — 3/23/13

The Top 10 stories of the week, in one convenient serving.
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How Apple Gets All the Good Apps

While Apple never creates apps for other mobile systems or devices, its major mobile-platform foes — Google, Amazon and Microsoft — make many of their apps available for Apple devices.

Q4 Earnings Call: Mayer Says “Chain Reaction” Needed to Blast Yahoo Into the Future

Turnaround via nuclear fission.

Sweet! Mayer Declares That It’s Peanut Butter and Jelly Time at Yahoo.

Good riddance to the Peanut Butter Manifesto and hello to Process, Bureaucracy & Jams.

Where in the World Is HP’s Prith Banerjee Going? Answer: Zurich.

Banerjee is off to be CTO of the Swiss Industrial giant ABB.

Pulling Back Apple’s Magic Curtain: Fortune’s Lashinsky Talks About New Book (Video)

And you’ll be interested to see what he found.

News Byte

eBay Acquires Invoicing Company in Germany

EBay has acquired BillSAFE, which serves 15 million accounts in Germany, after buying a minority stake in the company last year. Terms were not disclosed. With BillSAFE, PayPal customers will now be able to receive an invoice for an order, after items have been shipped and received. Because of its security benefits, purchasing by invoice is used heavily in Germany, Austria, Switzerland and the Netherlands, eBay says.

Exclusive: Groupon’s Mason Tells Troops in Feisty Internal Memo: “It Looks Good.”

Facing a barrage of negative press about its upcoming IPO, Groupon CEO and co-founder Andrew Mason took up a pen to counter critics of the social buying service in a pugnacious email to employees.

Two Months, Two Million iPads