Ethereum Classic is an open-source, public, blockchain-based distributed computing platform featuring smart contract (scripting) functionality. The Ethereum platform has been forked into two versions: "Ethereum Classic" (ETC) and "Ethereum" (ETH). Prior to the fork, the token had been called Ethereum.
The majority of the Ethereum community at that time supported the hard fork. But a minority of users were against the hard fork, so they continued on the old blockchain and called themselves “Ethereum Classic”.
Ethereum Classic’s blockchain is the same in every way with Ethereum’s until Block 192000, where the hard fork was applied.
Ethereum Classic (ETC) is also a decentralized programmable blockchain like Ethereum. And like ETH, ETC is traded on exchanges and offers the same functionality of decentralized apps and smart contracts as Ethereum (ETH). It also has the same smart contracts language called Solidity.
ETC is basically the same as ETH.