A DVD-ROM drive reads DVDs (digital versatile disc digital versatile disc). The DVD in this case has a much larger capacity than a CD.
A combo drive, however, combines the ability to read DVDs and CDs. However, this can only describe as CD-RW and CD-R.
To describe DVDs you need a DVD burner. This reads both DVDs and CDs and can describe both also. Small hint on the : DVD-R (DVD -Recordable) stands for write once, DVD-RW (DVD-Rewritable) stands for repeatedly writable, DVD-RAM (DVD-Random Access = MEMORY) is for, DVDs with free read and write access and multi- riable data; DVD-DL (DUAL lAYER DVD) represents two data layers on one s of the DVD
Then there is the technology, which still can store larger amounts of data and is also backward compatible with DVDs and CDs. burner can also write DVDs and CDs in addition to discs. drives work with another laser technology as DVD drives. The used here, the laser beam has a wavelength of 405 nm as opposed to 650 nm with a DVD laser. This shorter wavelength allows dense to arrange the data on the disc and thus achieve a higher storage capacity.