EPUB amafayela
I-PDF (Portable Document Format), ifomethi edalwe i-Adobe, iqinisekisa ukubukwa kwendawo yonke ngombhalo, izithombe, nokufometha. Ukuphatheka kwayo, izici zokuphepha, nokuthembeka kokuphrinta kuyenza ibaluleke kakhulu emisebenzini yamadokhumenti, ngaphandle kobunikazi bomdali wayo.
I-EPUB (Electronic Publication) iyindinganiso ye-e-book evulekile. Amafayela e-EPUB adizayinelwe okuqukethwe okukwazi ukugeleza kabusha, okuvumela abafundi ukuthi balungise usayizi wombhalo nesakhiwo. Avame ukusetshenziselwa ama-e-books nezici ezisekelayo ezisebenzisanayo, okuzenza zifaneleke kumadivayisi ahlukahlukene e-e-reader.