PowerPoint is one of the most popular tools for presenting information. But at Amazon, the software program takes a back seat to written memos.

In a letter to shareholders, founder and CEO Jeff Bezos reveals that company execs "don't do PowerPoint" or any other slide-oriented presentations. Instead, "Amazonians" create six-page narrative memos that are read at the beginning of each meeting—kind of like a "study hall" session, he says.