The Celebration CARW2021 Series was born during Mar 2021 and includes cache titles of "Celebrating X - CARW2021" (where X = media types starting with letters A-J). That set of 10 caches has clues in each one to gather up to solve for the bonus Celebrating Media (Bonus). While no longer CARW2021, and while not continuing a clue trail, here's another for the fill in the missing alphabet letters - this one, brought to you by the letter T.
Technology - noun; machinery and equipment developed from the application of scientific knowledge.