Specifications and Tools

UEFI Specification and Test Tool Status Diagram

The following diagram shows the current statuses and revisions of the UEFI specifications and test tools.

Overview Information

The UEFI Specifications define a new model for the interface between personal-computer operating systems and platform firmware. The interface consists of data tables that contain platform-related information, plus boot and runtime service calls that are available to the operating system and its loader. Together, these provide a standard environment for booting an operating system and running pre-boot applications.
You may view the current versions of the ACPI Specifications, UEFI Specifications, UEFI Test Tools, and Subdirectory Registry by visiting the links provided below:
The latest versions of the ACPI Specification, UEFI Specifications and Test Tools are available for download on the "Access to the Specs and Test Tools" page. 
You may also access information related to the ACPI standard on the following pages: