IEC-62138 Complete Document History
Nuclear power plants - Instrumentation and control systems important to safety - Software aspects for computer-based systems performing category B or C functions

Complete Current Edition:
   EDITION 2.0 - Software aspects for computer-based systems performing category B or C functions - July 1, 2018

Obsolete Revision Information:
   1ST EDITION - Software aspects for computer-based systems performing category B or C functions - Jan. 1, 2004