Lub tsev qiv ntawv yog cov ntaub ntawv khaws tseg ntawm cov ntaub ntawv thiab cov peev txheej zoo sib xws, xaiv los ntawm cov kws tshaj lij thiab ua kom nkag mus tau rau lub zej zog uas tau hais tseg rau kev siv lossis qiv, feem ntau nyob rau hauv ib puag ncig ntsiag to rau kev kawm. Nws muab lub cev lossis digital nkag mus rau cov khoom siv, thiab tej zaum yuav yog qhov chaw ntawm lub cev lossis qhov chaw virtual, lossis ob qho tib si. Lub tsev qiv ntawv sau tuaj yeem suav nrog cov phau ntawv, ntu ntu, ntawv xov xwm, ntawv sau, zaj duab xis, daim duab qhia chaw, luam tawm, cov ntaub ntawv, microform, CDs, cassettes, videotapes, DVDs, Blu-ray Discs, e-phau ntawv, audiobooks, databases, thiab lwm yam. Cov tsev qiv ntawv muaj ntau qhov loj txog li tsheej lab ntawm cov khoom.