USSR' stamps should be there too I think. Hacker News special: https://terrainformatica.com/wp-content/uploads/2018/10/Stamp_Soviet_Union_1977_CPA4778.jpg ht

USSR' stamps should be there too I think. Hacker News special: https://terrainformatica.com/wp-content/uploads/2018/10/Stamp_Soviet_Union_1977_CPA4778.jpg https://terrainformatica.com/wp-content/uploads/2018/10/Stam... This is the stamp featuring first (AFAIK) optical character recognition state wide implemented service - USSR's automatic postal cards and letters sorting by indexes.