Thaum ua haujlwm ntawm lub khoos phis tawm, nws tsis yooj yim sua kom tsis txhob ntsib cov ntaub ntawv - cov ntsiab lus ntawm cov kev ua haujlwm, uas yog cais cov ntawv thov lossis teeb tsa cov ntaub ntawv binary rau lawv cov kev tshaj tawm. Koj yuav tsum nkag siab lub tswv yim no.
Ib lub koos pis tawj (los ntawm ntawv Askiv - ntaub ntawv, dossier) yog ib qho kev txiav txim sau ntawm cov ntaub ntawv uas muab khaws cia rau hauv disk thiab nyob ib cheeb tsam cais ntawm lub cim xeeb sab nraud. Khoos phis tawj cov ntaub ntawv tuaj yeem xav tias yog cov neeg niaj hnub ua ke rau cov ntawv cov ntawv uas ib txwm muaj nyob hauv chaw ua haujlwm thiab tsev qiv ntawv kab ntawv (li no lub sij hawm). Lawv pib muaj cov metadata uas tso cai rau koj kom tau txais qee cov ntsiab lus hais txog ib qho khoom thiab txiav txim siab ib lossis lwm hom ntawm cov hom. Cov ntaub ntawv hauv koos pis tawj tuaj yeem ntim cov ntawv me dua, feem ntau hu ua "cov ntaub ntawv" lossis "kab". Ib daim ntawv ua qauv, piv txwv li, tuaj yeem muaj cov kab ntawm kab ntawv uas sib haum rau cov kab ntawv sau lossis luam rau ntawm ib daim ntawv. Ib qhov system file tuaj yeem tso cov duab (binary) los yog cov lus qhia siv lub tshuab los ua ib qho haujlwm tshwj xeeb. Qhov ntaub ntawv system yog kev sib sau cov ntaub ntawv thiab cov ntaub ntawv qhia qhov tshwj xeeb ntawm lawv. Lub hom phiaj ntawm cov ntaub ntawv kaw cia yog npaj cov ntaub ntawv rau kev tshawb pom yooj yim dua. Muaj cov ntaub ntawv sib txawv, lawv txawv nyob hauv txoj kev uas lawv khaws ntaub ntawv thiab muaj peev xwm ntxiv. Cov yam ntxwv no tuaj yeem suav hom, siv cov cai, qhov loj me, hnub hloov kho ntawm lub sijhawm kawg, thiab lwm yam. Cov ntaub ntawv hauv koj lub computer tuaj yeem tsim, hloov chaw ntawm ib qhov chaw mus rau lwm qhov, hloov kho ntawm koj qhov kev txiav txim, hloov npe, ntxiv thiab tshem tawm (tshem). Feem ntau, khoos phis tawj yog lub luag haujlwm rau cov haujlwm no, txhua tus tau nkag siab cais cov hom ntaub ntawv (nkauj, ntawv nyeem, kab ke thiab lwm tus).