# Token standards

## Introduction <a href="#introduction" id="introduction"></a>

Many Electroneum Smart Chain development standards focus on token interfaces. These standards help ensure smart contracts remain composable, so for instance when a new project issues a token, that it remains compatible with existing decentralized exchanges.

## Prerequisites <a href="#prerequisites" id="prerequisites"></a>

* [Electroneum development standards](/advanced/standards.md)
* [Smart contracts](/electroneum-stack/smart-contracts.md)

## Token Standards <a href="#token-standards" id="token-standards"></a>

Here are some of the most popular token standards on the Electroneum Smart Chain:

* [ERC-20](/advanced/standards/token-standards/erc-20-fungible-tokens.md) - A standard interface for fungible (interchangeable) tokens, like voting tokens, staking tokens or virtual currencies.
* [ERC-721](/advanced/standards/token-standards/erc-721-nfts.md) - A standard interface for non-fungible tokens, like a deed for artwork or a song.


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