A writer compared letters and social media posts: “What is special about a letter is the time that is taken in creating a letter—

that someone went to the trouble of finding a piece of paper, sitting down, crafting their thoughts, putting them on paper, and that they created this document really just for me. A letter is a very singular expression, it’s a unique document, and for that reason, to get it in the mail feels almost like a gift. . . . It’s a piece of paper that I can feel. . . . There’s a physical connection.” How might these observations apply to business letters? What other special traits can you identify?