can someone specify what is a writer and how does it work?

Answer 1

i think u mean Cd writer
yes it's Cd Burner
a hardware device like CD_ROM
but u can only use cd-rom for reading files on a cd but when u have cd writer u can put files on Blank cd's
u can write your files to cd but some programs for burning like Nero or Window xp write cd option
remmember that u can read files on cd with cd writer too
it's read and write permission

Answer 2

I agree with 942