What type of documentation provides installation instructions and last-minute release notes?

The type of documentation that provides installation instructions and last-minute release notes is commonly referred to as "Read Me" files. These files are specifically designed to be a concise source of information that users need to know, including system requirements, installation steps, and any changes or important notes that may not be covered in the main documentation.

While help files generally provide detailed assistance and guidance on using the software, and documentation encompasses a broader range of materials, "Read Me" files focus on immediate, practical information necessary for installation and last-minute updates. Therefore, choosing "Read Me" recognizes its targeted purpose in software distribution and user guidance.