Appendix Recommender System Comparison Chart System type No, of Input Items Mems to rate Rating scale Use of Genres or Info about ecommended (dont like it)to Not us over title (www.amazon.comusic(partof individual, then 5(love n) (at the time of artist /author lactors/dir rec set(l t/5 commerce ste)opportunity to refine audio clps, critics& No Books 12boc我s Shaded bar Not used expictly Cover, title, author, Give feedback on www.pmetrics.co synopsis, number of rec set. 1 item splayed at a time Like t or not Books . Versio: Title epeat rati Quick Picks heckbox) genre before author year only (www ratingzonec info at Amazon Movie Critic 1 to 9 Optional genre tle and year only, Give feedback on www.movecriticc 1 movie nd ividual wreel. com) merce st drector actors. brief Media Unbound Music System Scale d ffers ng title, artist, an ate items (www.medaunbou 85-6 other dependng on at th audio clip playist or repeat beginning. Can ating process from choose sub-genre the start Song Explorer nas Must choose 1 or Cover, artist name (www songexpore more genres at the album title, audio clip beginning Music (part of e er, artist nam epeat ratin (www.cdnow.com Mood Logic to 9 fiters genre a burn title, audo chi orocessAppendix. Recommender System Comparison Chart