What's the difference between dvd-r, dvd-rw, dvd r, and dvd rw?

Question

What's the difference between dvd-r, dvd-rw, dvd r, and dvd rw?

Answer 1

All are blank media, however dvd rw discs can be erased and used again. r discs are use once only

Answer 2

DVD+ ("plus") and DVD- ("minus") were originally separate formats requiring different writers, but nowadays all blank discs are interchangeable between all writers, so it's not a difference you need to worry about unless you're using outdated equipment.

"R" discs are write-once (you can record on them once, and that's it), whereas "RW" are write-many (you can erase the discs and record on them as many times as you like).

Answer 3

Ok well the only one i know is DVR which is Digtal Video Recorder