SAS 70 (Statement on Auditing Standards 70) is an in-depth audit of a service organization's controls, specifically focusing on internal controls over financial reporting. It examines processes and activities thoroughly. TPISA is a Tata internal framework, COPC is for customer operations, and ISO is a broader quality management standard - none are specifically in-depth control audits like SAS 70. The question contains a typo (indept should be in-depth).