Q: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Photo from Inara Prusakova/Shutterstock 
  
 There are a finite number of Internet protocol, or IP, addresses, the numeric codes that identify devices and destinations for the Internet. The current system, IPv4, has 4.3 billion (or 4.3 x 10^9) combinations to go around. This might all sound like boring Internet infrastructure stuff, but there's some serious drama going down, because the IPv4 addresses are almost all gone. 
  
 The Wall Street Journal reports that all remaining IP addresses in the United States will be claimed as of this summer. It's not a doomsday scenario—Asia ran out in 2011 and Europe in 2012—but it's a reality that companies and developers will need to face now, if they haven't started already. 
  
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 Concerns about IPv4 are nothing new. A replacement for IPv4, known as IPv6, was approved in 1998 and has been available and implementable ever since. It offers 3.4 x 10^38 addresses (otherwise known as 340 trillion trillion trillion), so it's certainly a viable solution. 
  
 In a big systems transition, though, there are always groups that hold out as long as possible on a legacy system, either out of laziness or lack of economic incentive. You don't need to look any further than the transition away from Windows XP to find a good example. 
  
 Some companies have been diligently preparing. Facebook, for example, has switched 90 percent of its network to IPv6. In contrast, Microsoft spent $7.5 million in 2011 buying 666,624 IPv4 addresses. 
  
 James Cowie, the chief scientist at Internet consulting firm Dyn, told the Journal, “Enterprises that don’t have a plan for what to do with this will have this brought up by their board.” ||||| A flying car crashed during a test flight in Slovakia on Friday. The Aeromobil car was piloted by Stefan Klein, a co-founder of the company. Klein was able to deploy a parachute for the vehicle, which is said to have helped ease the severity of the impact. 
  
 Witnesses near the Nitra Janíkovce airport described seeing the flying car go into a tailspin before the parachute was deployed. Klein was taken to the hospital and released without any serious injuries. However, the flying car wasn’t so lucky. Judging by the photos taken at the scene, the vehicle sustained fairly serious damage. 
  
 If the Aeromobil name sounds familiar, that’s because it has been the Great Flight Hope of flying car nerds recently. The vehicle has been featured prominently in magazines and newspapers around the world, with promises that the flying car is now just around the corner. The company has even claimed that they could release the vehicle by 2017. 
  
 For what it’s worth, the company is putting on a brave public face, saying that crashes are all part of the struggles to get experimental vehicles operational. 
  
 “The detailed data and overall experience from this test flight will be thoroughly analyzed and the results will be used in the ongoing R&D and improvements of the prototype,” Aeromobil said in a statement released yesterday. “Testing of the current prototype 3.0 and further product development will continue after the replacement of the damaged parts.” 
  
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 It’s unclear if this will impact the company’s planned public release of the vehicle within the next two years. But honestly, we weren’t holding our breath, even before this weekend’s crash. 
  
 Below, a photo of what the Aeromobil flying car looks like when it’s not all munted. 
  
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 Image via Nitra.sme.sk and Prague Post ||||| Office space in Silicon Valley isn’t the only real estate that’s gotten scarce in the booming technology market. The U.S. organization that distributes some of the Internet’s most important virtual property is running out of inventory. 
  
 Some savvy companies have been stocking up, but the shortage could mean headaches—and significant costs—for U.S. businesses looking to expand on the Internet. 
  
 The... |||||
A:
Engineers who created 4.3 billion Internet Protocol addresses back in 1981 probably thought that by the time we ran through all those, we'd be puttering around in flying cars. Flying cars are going to be a while, but it looks like our IP numbers are finally up: The American Registry for Internet Numbers, the group that hands out the numerical codes, says there are only 3.4 million IPv4 addresses left, and the group's president says the supply will probably dry up by summer, the Wall Street Journal reports. Major companies like Amazon and Microsoft are scooping up remaining addresses while they can, while others such as Facebook decided to bite the bullet and simply upgrade to the newer IPv6 system (IPv5 never really took hold). It's not exactly an online End Times, as dire as it sounds: Asia depleted its supply of IPv4 addresses in 2011, Europe the following year, the Journal notes. And there's quite a bit of capacity under the newer IPv6 system—it can accommodate up to 340 undecillion (340 followed by 36 zeros) addresses. The main obstacle to upgrading right now seems to be the expense, not resistance to more advanced technology: A companywide migration can cost about 7% of the firm's annual IT budget, per research cited in the Journal. To see if your Internet connection supports IPv6 and/or check out IPv6-only websites, Slate points you toward the Test-IPv6.com site. (We haven't exactly been blindsided with this news, either.)