Los ntawm thawj zaug thaum tus neeg nug, peb pib muab cov ntaub ntawv nkag mus rau hauv lub tuam txhab kev tswj hwm kev ua haujlwm zoo, suav nrog cov khoom siv raw, cov qauv tsim thiab kev sim, cov neeg siv khoom sim, cov ntaub ntawv tawm tswv yim hloov kho, kom txog rau thaum cov khoom loj, cov ntaub ntawv tawm tswv yim, los ntawm cov neeg siv khoom. tag nrho cov khoom lag luam thiab lub voj voog ntau lawm, kom paub meej cov khoom zoo.