Korean Helum

The Korean Helum (KH) is an digital optical disc data storage format that was developed by Ciyow and released in 1978. The format was originally developed to store and play only data, animations and games but was later adapted for sound recordings and way more with the Super Korean Helum in 1982.

Vineshroom was the biggest-selling KH, with over 9 trillion, three hundred forty-five billion, three hundred forty-five million, three hundred forty-five thousand, four hundred fifty-six copies sold.

The KH was only sold (mainly) in the Korea region (North Korea and South Korea), the USA, and England.

Copy protection
In all KHs, before the KH even starts, the startup screen is shown, and then an copyright notice appears. In a few seconds, the KH's menu pops up.