The Merriam-Webster Online Dictionary states that the word "lectern" is derived from "legere," a Latin word meaning to read. The term is interchangeable with the words podium or speaker stand. People in various occupations use lecterns.

Religion

The traditional purpose of a lectern was to provide a place for a speaker to present the scriptures during a church service, according to the Merriam-Webster Online Dictionary. The top of the lectern provided support for a script or Bible.

Education

Teachers, notably college professors, use a lectern when presenting lectures. A wooden or metal lectern allows a person to place notes, books and cards at a convenient level for reading to a classroom of students.

Law

Courtrooms have lecterns that sit atop tables as well as full-sized lecterns for attorneys to stand behind. A lectern allows a lawyer to place papers, note cards and law books on the top for easy reference--and pound upon it for effect in persuasive argument.

Politicians

Political figures use lecterns to hold manuscripts and visual aids while speaking. The presidential lectern has a clock, microphone and recording device as well as a bulletproof cap that provides personal protection.

Public Speakers

Professional speakers find that the lectern establishes a formal platform that is associated with authority. However, Aileen Pincus, president of an executive coaching firm and columnist for BusinessWeek.com, states that the audience finds the podium a "barrier to good communication," since it creates a boundary between the speaker and the group.

Source:

Merriam-Webster's Online Dictionary

YouTube: Presidential Lift Podium

BusinessWeek.com: Public Speaking