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His first design included a lever that pierced a hole in the top of the can, but this caused a safety hazard as it produced sharp edges that could cut the user's finger. Later that year, he established a mechanism known as the " pull-tab " can, with its users simply being required to pull a removable tab to open the drink.
The final revised documentation for PDF 1.7 was approved by ISO Technical Committee 171 in January 2008 and published as ISO 32000-1:2008 on July 1, 2008, and titled Document management – Portable document format – Part 1: PDF 1.7. ISO 32000-1:2008 is the first ISO standard for full function PDF.
Westermarck argues that marriage is a social institution that rests on a biological foundation, and developed through a process in which human males came to live together with human females for sexual gratification, companionship, mutual economic aid, procreation, and the joint rearing of offspring.
A birthday card is a greeting card given or sent to a person to celebrate their birthday. Similar to a birthday cake , birthday card traditions vary by culture but the origin of birthday cards is unclear. [ 1 ]
Invented world's first functional program-controlled computer John von Neumann [ 61 ] Became "intrigued" with Turing's universal machine and later emphasised the importance of the stored-program concept for electronic computing (1945), including the possibility of allowing the machine to modify its own program in useful ways while running.
Engineers during World War Two test a model of a Halifax bomber in a wind tunnel, an invention that dates back to 1871.. The following is a list and timeline of innovations as well as inventions and discoveries that involved British people or the United Kingdom including the predecessor states before the Treaty of Union in 1707, the Kingdom of England and the Kingdom of Scotland.
The dealer of the first hand is chosen by dealing out the cards until someone receives a jack. That person becomes dealer, shuffles the cards, and offers the deck to the player on his right to cut.
The first postal cards have been used by William Henry Jackson, an artist and photographer, who painted Civil War battlefields in the beginning of the 1860s and used them to write to his family. [3] Charlton invented the private postal card around the same time in 1861 in Philadelphia. He copyrighted and patented [4] the idea in the same year. [5]