No doubt you have heard of Ethereum. Well, Ethereum Classic is another currency that is derived from the original one. As such, it is not a new cryptocurrency – rather, it has been split from the original Ethereum currency via a hard fork. It split the blockchain into two, with the original currency on one and the Ethereum Classic currency on another.
The Classic version runs under the currency code ETC, whereas Ethereum uses ETH. It is vital to understand this minor difference, so you can easily tell which virtual currency you are looking at. There has been plenty of disagreement over whether the hard fork should have occurred, and where it has left many users.