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

Imation (DVD±R/RW & BD-R/RE)

DVD/HDD Recorder : SHARP

What is the difference between CD-R, CD-RW, DVD-R, and DVD-RW? - Quora

Tech Support: DVD-R vs DVD+R

OWC 16X DVD-R Write-Once Disc with Slimline Jewel Case

CRI DVD-R Blank Recordable Discs - CD Rom Inc

DVD-R 4.7GB Multilaser com box - unidade - CCL Distribuidora

DVD+R vs DVD-R - Difference and Comparison

About DVD+R and DVD-R: Qualities and Functions Explained

Does anyone have any idea how to open a DVD-R disc? Doesn't open

Dvd-R Microbuy com Logo em Promoção na Americanas

DVD-R Definition - What is a DVD-R disc?