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London's Metropolitan Police have been urged to back down on plans to once again use facial recognition software at next weekend's Notting Hill Carnival. Privacy groups including Big Brother Watch, Liberty and Privacy International have written to police commissioner Cressida Dick (PDF) calling for a U-turn on the use of the tech. Automated facial recognition technology will snap the party-goers' faces, and run them against a database. The aim is to alert cops to people who are banned from the festival or are wanted by the police, presumably so they can take immediate action. The tech was first tested at the festival - where relations between police and revellers are often strained - last year, but it failed to identify anyone.

The timeline below identifies key developments on tech platforms used by journalism publishers. Here you can explore the significant shifts in the platform landscape as these companies adjust to new relationships with publishers.

Users should be aware of why people use Facebook to avoid feelings of envy

At least that's the claim of a proposed class-action lawsuit filed late Tuesday in Illinois that accuses the high-end audio equipment maker of spying on its users and selling information about their listening habits without permission.

openPDS/SafeAnswers allows users to collect, store, and give fine-grained access to their data all while protecting their privacy.