It contains the following submodules, each of which can be imported and versioned independently.

• algo: common algorithm implementations.
• aws: Amazon Web Services related packages.
• cmdutil: support for building command line tools.
• debug: support for instrumenting code to trace execution and communication.
• errors: support for working with go errors post go 1.13.
• file: support for working with files and filesystems, including cloud storage systems.
• io: I/O related packages.
• net: network/http related packages.
• os: os related and/or specific packages.
• path: support for working with paths and filenames, including cloud storage systems.
• sync: easy to use patterns for working with goroutines and concurrency.
• text: support for operating on text/in-memory data.
• webapp: support for implementing webapps.