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Fire testing of floor coverings
interfaceinc.scene7.comThis European standard for the fire classification of construction products according to their reaction to fire tests lays down the classes for the flammability of floor coverings, which are now applicable throughout Europe.
Bitcoin: A Peer-to-Peer Electronic Cash System
bitcoin.org4. Proof-of-Work To implement a distributed timestamp server on a peer-to-peer basis, we will need to use a proof-of-work system similar to Adam Back's Hashcash [6], rather than newspaper or Usenet posts.