In addition to being a popular website for users to share and embed personal photographs, and effectively an online community, the service is widely used by photo researchers and by bloggers to host images that they embed in blogs and social media.
Photos and videos can be accessed from Flickr without the need to register an account but an account must be made to upload content onto the website.
The service emerged from tools originally created for Ludicorp's Game Neverending, a web-based massively multiplayer online game.
Flickr proved a more feasible project, and ultimately Game Neverending was shelved; The successive evolutions focused more on the uploading and filing backend for individual users and the chat room was buried in the site map.
While it could prove useful – if you want some important details to remain on-screen instead of being pushed out of sight by newer messages, for instance – it’s also likely to be abused by admins, who could easily use it to annoy other group members.
Admins will only be able to change the setting every 72 hours, which means group members will be silenced for days at a time.
You can test it out now by signing up to the beta version of Whats App.
The images a Flickr photographer uploads go into their sequential "photostream", the basis of a Flickr account.
All photostreams can be displayed as a justified view, a slideshow, a "detail" view or a datestamped archive.
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The Justified View is paginated between 72 and 360 photos per page but unpaginated in search result presentation.