The term "integration at the glass" originally found at https://web.archive.org/web/20071015095751/http://www.manageability.org/blog/stuff/integration-at-the-glass-and-80-20-point/view
For applications which run in the browser and pull fragments from different servers.
The servers don't (necessarily) know anything about each other. Only the UI (the glass screen where the browser runs) knows them.
I guess this is what we call MicroServices these days.
See also :