The 1918 flu pandemic, commonly referred to as the Spanish flu, was a category 5 influenza pandemic caused by an unusually severe and deadly Influenza A virus strain of subtype H1N1.
Project Lead The Way (PLTW) is an American nonprofit organization that develops STEM curricula for use by US elementary, middle, and high schools.
Definition of TW. TW. interjection. acronym for trigger warning. Used in web-based forum titles as a warning that the contents of a post may trigger people's compulsions, for example: overeating, bulimia, and cutting. See more words with the same meaning: Internet, texting, SMS, email, chat acronyms (list of). Last edited on Sep 18 2012.