A DVD, or digital video disc, is an optical disc that is typically used to store movies.
DVD’s were first invented in 1995 and are not just used to store movies. They can also store software and just about any type of digital media.
How much do DVD’s weigh?
They are light in weight. A DVD weighs just 0.58 ounces on average (0.016 kg).
The case that holds the DVD weighs around 2.37 ounces (0.067 kg).
A single-sided DVD disc can store up to 4.7 gb of data and a dual-layer DVD can store up to 8.5 gb of data.
DVDs very quickly replaced VHS. The main reason was due to the superior quality of DVDs, their lifespan of the disc, and most importantly, they were interactive.
DVDs contain an encryption known as CSS (Content Scramble System) which makes it very difficult to copy DVDs byte for byte, although there is widely available software that can decrypt CSS.
Following on from DVDs in 2006, Blu Ray and HD DVDs were released. HD DVD’s went head to head with Blu Ray and ultimately lost that battle.
A typical Blu Ray disc can store up to 50gb which is a huge step up from DVD.
~ Fun Fact ~
The data track on a double-sided DVD disc is around 30 miles along.