1. Katin zane-zane (Katin bidiyo, katin zane-zane) Cikakken sunan katin nuni, wanda aka fi sani da adaftar nuni, shine mafi sauƙin tsari kuma ɗaya daga cikin mahimman kayan haɗin kwamfuta.
A matsayin muhimmin ɓangare na mai masaukin kwamfuta, katin zane-zane na'ura ce da kwamfuta ke amfani da ita don yin canjin siginar dijital zuwa analog, kuma tana ɗaukar nauyin fitarwa da nuna zane-zane;
 

2. Na'urar saka idanu (monitor) na'urar saka idanu ce ta kwamfuta, wato na'urar shigar da bayanai (input and extension). Kayan aiki ne na nuni wanda ke nuna wasu fayilolin lantarki a allon ta hanyar wani takamaiman na'urar watsawa sannan ya nuna su ga idon ɗan adam. Nunin kawai na'urar nunawa ne kuma baya shiga cikin sarrafa bayanai da canza bayanai;
 
3. Ingancin katin zane zai shafi fitowar nunin allo kai tsaye, kuma gazawar katin zane zai haifar da mummunan allo, allon shuɗi, allon baƙi da sauran munanan yanayi;
 
4. Katin zane yana da alaƙa da ƙuduri da lokacin amsawa na allon; katin zane mai inganci yana da na'urar saka idanu mai inganci; katin zane mai inganci yana fitar da ƙuduri mai kyau;
 
5. Ingancin katin zane yana shafar saurin, watsawa da ayyukan sarrafa katin zane don sarrafa hotuna, kuma allon nuni ana amfani da shi ne kawai azaman na'urar fitarwa ta nuni.