There are two editions of Glink for Windows: Glink Professional Edition and Glink Enterprise Edition
The Professional Edition is intended for freestanding workstation usage, and is licensed by number of seats i.e. the number of workstations on which it is installed, or the number of thin clients that are able to use it in a Windows Terminal Server environment. Glink Professional Edition includes all the emulations, and a single user can start as many simultaneous copies as needed, each with a different configuration, accessing multiple applications on multiple mainframe systems. Glink Professional Edition includes the Glink workstation APIs (COM+ and OLE automation) for application development, but the Professional Edition is restricted to 5 sessions for workstation application programs using the API.
The Enterprise Edition is intended for installation on one or more servers supporting Glink usage in several modes, and is licensed by number of simultaneous sessions, regardless of the number of potential users.