I bought a Asus dvd writer, i hv slight confusions regarding the reading/writing speeds and symbols! It supports following formats- DVD-RAM, DVD+/-R/RW, CD-Text/Extra, Karaoke CD, DVD Single/dual layer discs, CD-Rom/XA, Photo CD, CD-DA, Video CD, CD-R, CD-RW. Now i want to know the full forms of the following notations- DVD+/-R DL DVD+/-RW DVD-RAM(whats it?) CD-R CD-RW what does +/- symbols mean etc. I know the full forms of some of them but i have slight confusions! Thanx!