Sectors of the Stock Market

There are 118 named elements in the Periodic Table. How many can you guess?

There are 78 different names for the currencies used by the different countries of the world. How many can you name?

For each country of the world, name the country to which they export the greatest amount of goods and services.

Name all of the publicly-traded U.S. companies that have ever reached a market valuation of $1,000,000,000,000.