First
131First to file and first to invent — are legal concepts that define who has the right to the grant of a patent for an invention. The first to file system is used in the majority of countries, with the notable exception of the United States, which operates a first to invent system. [ …
132First contact (science fiction) — First contact is a common science fictional theme about the first meeting between humans and aliens, or, more broadly, of any sentient race s first encounter with another one. The theme allows authors to explore such topics such as xenophobia,… …
