Commentairesm(A color-coded status, which is displayed on the Seating Chart, that a user can set to communicate with the meeting presenter); commentairesm(Comments about a completed assignment that an educator makes during review and grading and that are available to the student once the grade is posted); rétroactionf(The return of a portion of system output as input to the same system. Often feedback is deliberately designed into a system, but sometimes it is unwanted. In electronics, feedback is used in monitoring, controlling, and amplifying circuitry)