BBC Technology News

• Messaging app Slack becomes latest blockbuster tech flotation
  The messaging app firm, valued between $15-$17bn, has taken an unusual route to the stock market.
• Government error delays online pornography age-check scheme
  A scheme hoping to stop under-18s stumbling across adult content was due to come into force in July.
• Loot boxes aren't gambling, says EA
  A spokesperson for the company says the system is "quite ethical" and something gamers enjoy.
• Fortnite makers grilled by MPs over game safety
  MPs ask whether Epic Games does enough to prevent users spending too much time or money on the game.
• Unseen 9/11 photos bought at house clearance sale
  The images were stored on CD Roms bought at a house clearance sale.
• Facebook 'mysteriously locks out Hungarian users'
  The social network has disabled a large number of accounts in error, according to reports.
• Facebook urged to pause Libra crypto-currency project
  A US lawmaker asks Facebook to wait before launching its digital currency, hours after it was announced.
• China loses ground in top supercomputer list
  There are slightly fewer Chinese machines, and some more US ones, in the list of top supercomputers.
• Gambling: Four ads banned from Looney Tunes app
  The game - considered appealing to under 18s - gave players the chance to earn "gems" by viewing ads.
• Should we dislike the 'Like' button?
  Social media companies know approval can be addictive, so how should we manage the compulsion to be liked?