Cov ntawv cim cim (los ntawm Fabkis txoj kev sau ntawv - xws li memoria - nco) yog lub npe dav dav rau kev kos duab tshwj xeeb (kev ua koob tsheej, nco txog thiab lwm yam) cov ntawv xa ntawv, uas feem ntau tshaj tawm rau hnub tseem ceeb, piv txwv li, hnub tseem ceeb, rau kev saib xyuas lossis chaw kev ua koob tsheej, kev tshwm sim, tib neeg lossis khoom.
Lo lus "cim nco" txhais tau tias, ntxiv rau cov uas tau hais los saum no, kuj muaj cov ntawv sau npe thematic (cov duab uas tau muab tshwj xeeb rau cov ncauj lus tshwj xeeb).
Qee lub sij hawm cov lus no siv los ua kom yooj yim rau cov lus siv, piv txwv, qee zaum thaum nws tsuas yog yuav tsum hais txog tias lub thwj cim tsis yog siv tau (uas yog, tus qauv, uas tau tshaj tawm los ntawm kev tswj hwm rau kev niaj hnub noj thiab siv tsis muaj kev txwv ntawm lub voj voog).
Ntau lub chaw xa ntawv tau tshaj tawm ntau qhov kev nco los yog cim kom tau nyiaj txhua xyoo, qee zaum siv thawj hnub ntawm qhov kev tshaj tawm tau tshaj tawm ntawm qhov chaw muaj feem rau cov khoom. Cov kab ntim nco tau tuaj yeem siv nrog nrog cov ntawv nplua. Tsis zoo li cov ntawv tshaj tawm cov ntawv nyiaj, uas feem ntau xa khoom dua tshiab thiab muag ntev dhau lub sijhawm rau kev siv dav dav, cim nyiaj muas nco tau luam tawm tsawg tsawg thiab muag rau ntau lub sijhawm luv dua, feem ntau ua ntej xa hnub kawg.
Yog li, nco nyiaj muas tau tsim, raws li txoj cai, nyob rau hauv kev sib kis me me los ntawm qee hnub ntawm qib siab luam ntawv, hauv kev sib piv rau cov ntawv xa ntawv txheem, uas tau siv tau ntau xyoo, tau luam tawm nyob rau hauv huab hwm coj ncig thiab qee zaum muaj ntxiv khiav.
