Because the keyboard is so small, and because there was a significant latency between typing the note and the note appearing on screen, a lot of students found that they were overtyping. Many of the students got fed up with the keyboard, so they would just read on their Kindle and make notes in a separate notebook.” Also, the Kindle allows readers to make annotations only in e-book-format files, meaning that students couldn’t insert notes on any PDF-format files that were on the devices. “I think the first [e-reader] manufacturer that figures out how to make a PDF that you can also annotate is going to snag this market,” Temos predicts.