# Explorer v0.12.0 - Table of Contents > Series (one-dimensional) and dataframes (two-dimensional) for fast data exploration in Elixir ## Pages - [README](readme.md) - [Ten Minutes to Explorer](exploring_explorer.md) - [Changelog](changelog.md) ## Modules - [Explorer](Explorer.md): - [Explorer.DataFrame](Explorer.DataFrame.md): The DataFrame struct and API. - [Explorer.Datasets](Explorer.Datasets.md): Datasets used in examples and exploration. - [Explorer.Query](Explorer.Query.md): High-level query for Explorer. - [Explorer.Series](Explorer.Series.md): The Series struct and API. - Custom data types - [Explorer.Duration](Explorer.Duration.md): Represents a duration of time. - [Explorer.TensorFrame](Explorer.TensorFrame.md): TensorFrame is a representation of `Explorer.DataFrame` that is designed to work inside Nx's `defn` expressions. - Backends - [Explorer.Backend](Explorer.Backend.md): The behaviour for Explorer backends and associated functions. - [Explorer.Backend.DataFrame](Explorer.Backend.DataFrame.md): The behaviour for DataFrame backends. - [Explorer.Backend.LazySeries](Explorer.Backend.LazySeries.md): This is an opaque implementation of a Series. - [Explorer.Backend.QueryFrame](Explorer.Backend.QueryFrame.md): Represents a lazy dataframe for building query expressions. - [Explorer.Backend.Series](Explorer.Backend.Series.md): The behaviour for series backends. - [Explorer.PolarsBackend](Explorer.PolarsBackend.md): The Explorer backend for Polars.