DVD+R and DVD-R; What was that about?

DVD-R Recordable Gravável 4.7gb Bulk

Tech Support: DVD-R vs DVD+R

Buy DVD+R Double Layer Matt Silver

AZO DVD-R 4.7GB 16X with Branded Surface - 100pk Spindle: DVD R - DVD

Dvd-r Multilaser printable 16x 4.7GB midia virgem

DVD-R MAKETECH 4.7GB

New Key Moments feature on the app - skip to what you're interested in : r/

Verbatim DVD-R Blank Discs AZO Dye 4.7GB 16X

Difference Between DVD-R and DVD+R

What's the Difference Between DVD+R and DVD-R?