Paper size impossible to encounter ISO standard papers in day-to-day uses, with "Carta" (Letter), "Oficio" (Government-Legal) and "Doble carta" (Ledger/Tabloid) being nearly universal. In Canada, US paper sizes are a de facto standard. The government, however, also uses ISO paper sizes. There is an additional paper size, , to which the name "Government-Letter" was given by the IEEE Printer Working Group (PWG). It was prescribed by Herbert Hoover when he was Secretary of Commerce to be used for US government forms, apparently to enable discounts from the purchase of paper for schools, but more likely due to the standard use of trimming
Ledger (journal) timestamped into the bitcoin blockchain. Authors are also asked to include a personal bitcoin address in the first page of their papers. Ledger (journal) Ledger is the first peer-reviewed academic journal dedicated to cryptocurrency and blockchain technology research. The journal covers aspects of mathematics, computer science, engineering, law, economics and philosophy that relates to cryptocurrencies such as bitcoin. "Ledger" is an open access journal published by the University Library System (ULS) of the University of Pittsburgh and is cosponsored by the University of Pittsburgh Press. The journal expects to release full-publications twice a year and additional articles throughout. Individuals such