This document, POSC RP66 V1, is a specification of Petrotechnical Open Software Corporation.

This specification is based on and is equivalent in content to the document Recommended Digital Log Interchange Standard (DLIS), VERSION 1.00: API RECOMMENDED PRACTICE 66 (RP66) FIRST EDITION, MAY 1, 1991 published by the American Petroleum Institute (API). The acronym RP66 V1 is retained for historical reasons; POSC does not designate specifications as "Recommended Practices".

1998 by Petrotechnical Open Software Corporation