GAAS - General Accepted Auditing Standards
Auditor is responsible for performing an audit in accordance with GAAS. Compliance with GAAS is mandatory on all audit engagements.
ASB - Auditing Standards Board
GAAS for audits of non issuers are issued by AICPA’s ASB..
GAGAS - Generally Accepted Government Auditing Standards
Audit of government organizations, programs, activities, and of entities that receive government funds
PCAOB - Public Company Accounting Oversight Board
PCAOB establishes auditing and related professional practice standards to be used in the preparation and issuance of audit reports for issuers.
SSAE - Statements on Standards for Attestation Engagements
- apply to attest engagements
SSARS - Statements on Standards for Accounting and Review Services
Three levels of auditing guidance :