IBM - Network Program Products - General Information - MVS-VM-VSE
From the preface:
"This book is designed as a product overview for managers and planners responsible for evaluating programs to be used in their network. It describes the services you can obtain from a telecommunication network operating with the following IBM program products:
• VTAM Version 3 Release 1.2
This exhibit has a reference ID of CH8503. Please quote this reference ID in any communication with the Centre for Computing History.