This excerpt taken from the AAPL DEF 14A filed Mar 13, 2006.
Review the adequacy of the Corporations internal controls and the procedures designed to ensure compliance with applicable laws and regulations.
Consider and review with the independent auditor and the Director of Internal Audit the adequacy of the Corporations internal controls and any related significant findings and
recommendations of the independent auditor and internal auditing together with Managements responses thereto.
Establish procedures for receiving, retaining and treating complaints received by the Corporation regarding accounting, internal accounting controls, or auditing matters and
procedures for the confidential, anonymous submission by employees of concerns regarding questionable accounting or auditing matters.