This book is about migration to CICS® Transaction Server for z/OS® Version 3 Release 1. It provides information for users who plan to migrate from CICS TS Version 2 Release 3. For the purposes of this book, "migration" is generally taken to mean running existing applications at the equivalent level of function provided by the existing release.
If you are migrating from a release of CICS earlier than CICS TS Version 2 Release 3, you are recommended to read the Release Guide and the Migration Guide (where applicable) for the intervening releases.
Other Migration Guides which combine the information required by those who are migrating from some of these earlier releases are available in the CICS Information Center.