Penny Black VR official Penny Black VR official The VR official was one of three postage stamps introduced by the United Kingdom of Great Britain and Ireland in May 1840 for the pre-payment of postage. While the Penny Black and the Two Pence Blue were for use by the general public, as were the Mulready envelopes and letter sheets, the VR official was for use on official mail. In appearance the VR Official was the same as the issued Penny Black except that the Maltese crosses in the top corners were removed and replaced by the letters V and R, hence its common name.
Penny Black (research project) Penny Black (research project) The Penny Black Project is a Microsoft Research project that tries to find effective and practical ways of fighting spam. Because identifying spams consumes a recipient's time, the idea is to make the sender of emails "pay" a certain amount for sending them. The currency or the mode of payment could be CPU cycles, Turing tests or memory cycles. Such a payment would limit spammers' ability to send out large quantities of emails quickly. The project's name is derived from the Penny Black, the world's first adhesive stamp used for paid postage. The goal of the