Input (grade 8): Since 1985, the Britannica has had four parts: the MicropÃ dia, the MacropÃ dia, the PropÃ dia, and a two-volume index.
Output (grade 8): Since 1985, the Britannica has had four parts: the MicropÃ dia, the MacropÃ dia, the PropÃ dia, and a two-book index.