Reference Quora Quora: the best answer to any question. Word Reference Free online dictionaries - Spanish, French, Italian, German and more. Conjugations, audio pronunciations and forums for your questions. Ted.com TED is a nonprofit devoted to Ideas Worth Spreading - through TED.com, our annual conferences, the annual TED Prize and local TEDx events. Elsevier Home Elsevier is a global information analytics business that helps institutions and professionals progress science, advance healthcare and improve performance.