If you know about the history of the Internet, you know that — while Al Gore might be most famous for supposedly inventing it — it is the Department of Defense that can probably lay claim in earnest. The Advanced Research Projects Agency began building the networks that would become the Internet in the 1960s. And today the current form of that organization, the Defense Advanced Research Projects Agency (DARPA), is launching an office that will focus on biological technology — making synthetic tissues, quickly developing vaccines and connecting the brains of wounded soldiers to new prosthesis.

This week Microsoft’s Build conference kicks off in San Francisco. Build is an event designed to get developers excited about making things for its windows operating system, for mobile devices and PCs. And that’s been a challenge, because as app ecosystems go, Microsoft’s hasn’t been particularly vibrant in comparison to those of Apple and Android. There may be some light poking through the clouds though. Plus: Studies have been done on the effectiveness of treating addiction with smartphones, and the reviews are mixed. But there’s a new program at the University of Wisconsin that aims to support addicts after they leave a residential program. And it seems to be helping people stay sober.

Microsoft has now released versions of its Office software for the iPad. That news came in CEO Satya Nadella’s first press conference as the company head. Analysts say it’s been a long time coming — prevented by the company’s hope that Office could be used to boost sales of tablets based on the Windows operating system. Plus, play along with Marketplace Tech’s Friday numbers game: Silicon Tally.

Microsoft’s Satya Nadella will host his first press conference as CEO of the company. As its new leader, Nadella has his work cut out for him — while Microsoft’s business and cloud computing products have surged, hardware like its Surface tablet have not done so well. The new CEO might be about to announce that Microsoft Office software can now run on more devices. And it’s Spring Break. That means a lot of families are spending more time together than usual. And teens have a lot of extra time on their hands to overuse technology. But parents should remember: Those living in glass houses shouldn’t throw smart phones.

King, the company that makes the wildly addictive mobile game Candy Crush, has its initial public offering today. The company’s been valued at as much as $7.6 billion. But like so many 80s bands you’ve heard and never heard of, King might be a bit of a one hit wonder. Beyond the company’s big game are the lesser knowns worth the dollar bills? Plus, the story behind the eight foot tall robots directing traffic in Kinshasa.

Program description: You’ve heard plenty about cloud computing, but have you heard of the company called Box Inc? In the world of online storage and big data, Box is the David to online storage Goliaths like Microsoft and Oracle. We knew the company filed for an Initial Public Offering earlier this year. Well now Box has made the details of that filing public. 29-year-old CEO Aaron Levie and company hope to raise a cool $250 million, though Box isn’t profitable yet. Levie joins us to talk about his company.

Chester Wisniewski, senior security advisor at Sophos, joins us to talk about how PRISM will continue to affect the US tech industry abroad. Plus, what it’s like for mid-career switchers who are learning to code, and the advantages and disadvantages of being the oldest student in a class of coding “wizards.”

Diana Adams, a tech entrepreneur and consultant who has been on Twitter since it’s early days, joins us to talk about thinking strategically for first tweets. Plus, Marketplace reporter David Gura joins us for this week’s Silicon Tally.

How the Amazon Prime price hike may actually increase usage by Amazon customers. Plus, more on the Google Viacom settlement and safe harbor protections for service providers that host user content. Also, Cyrus Farivar, senior business editor at Ars Technica, about the Church Committee and the origins of the FISA court.