Lub nkoj cab yog qhov tseem ceeb ntawm lub nkoj cov lus qhia kev tswj thiab kev tswj. Nws yog tib neeg-lub computer kev sib raug zoo heev. Nws yog ib qho tseem ceeb uas yuav txo qhov kev nyuaj siab ntawm tus neeg tsav tsheb nyob ib puag ncig thiab kom muaj kev ruaj ntseg ntawm kev taw qhia. Nyob rau hauv qhov chaw tsav tsheb, tus qauv tsim muaj ntau yam xws li pom daim duab, pom ntawm qhov muag, qhov rais, channel, cov khoom siv, thiab lwm yam, thiab muaj cov kev sib txuas ntawm cov haujlwm. Txhua yam peb tuaj yeem xaiv ib tus neeg tsav tsheb zoo tsav tsheb thaum lub caij thov.
