-//! Besides basic data types, the standard library is largely concerned
-//! with abstracting over differences in common platforms, most notably
-//! Windows and Unix derivatives. The [`os`](os/index.html) module
-//! provides a number of basic functions for interacting with the
-//! operating environment, including program arguments, environment
-//! variables, and directory navigation. The [`path`](path/index.html)
-//! module encapsulates the platform-specific rules for dealing
-//! with file paths.
-//!
-//! `std` also includes the [`ffi`](ffi/index.html) module for interoperating
-//! with the C language.
-//!
-//! ## Concurrency, I/O, and the runtime
+//! The [`collections`](collections/index.html) module defines maps,
+//! sets, linked lists and other typical collection types, including
+//! the common [`HashMap`](collections/struct.HashMap.html).