Presenteristhepersonstandingonstagetopresenthistalk.ANon-presenter(co-author)mayworkswiththepresenter(Author)onthepaper,butthenon-presenterdonotstanduptogivethetalk.Anobserverissomeonewhodidnotcontributetothepaperatall.Butobserverawareofthecontentofthepaper,heobsevrewhathasbeengoingon.
Paperisoneormoresheetsofpaperbearingwritingorprinting,especially:
a.Aformalwrittencompositionintendedtobepublished,presented,orreadaloud;ascholarlyessayortreatise.
b.Apieceofwrittenworkforschool;areportortheme.
c.Anofficialdocument,especiallyoneestablishingtheidentityofthebearer.Oftenusedintheplural.
Posterisalarge,usuallyprintedplacard,bill,orannouncement,oftenillustrated,thatispostedtoadvertiseorpublicizesomething