Which was produced first?

Newbie Forum
#1

What type of dvd was produced first?

dvd-r or dvd+r?

and why were they produced?

#2

this might help http://www.digitalfaq.com/othervideo/dvdformats.htm

#3

i think dvd-r started in about 1997, then they where something like 3gb, dvd+r is very new, somebody please correct me if i am wrong