If it boggles you then I take it you’ve never used HP Service Manager
If I remember correctly, that POS had both close and exist on the same screen performing different functions.
Exit would close the window, and also break your workflow if you had HPSM open in two browser tabs
As competitors like ServiceNow came onto the scene, they tried to create a better web client, but at least when I was still close to that product, they never quite got there. My two final HPSM projects were:
1) Building a mobile / blackberry compatible web client from scratch (HTTP/SOAP) so management types could see/approve change requests on the go
2) Migrating to ServiceNow :P
It would not surprise me at all if they had some kind of ActiveX thing going on with their web client...