https://www.cemsys.com/products/access-control-systems/ac2000-software-modules/web-based-modules/
AC2000 Web Access Control Software Modules | CEM Systems
Part of the AC2000 access control system, AC2000 WEB is a suite of easy to use, powerful and fully integrated browser based applications.
web access controlsoftware modulescemsystems
https://www.devever.net/~hl/gatekeeper
Memoirs from the old web: The GateKeeper access control system
the old webaccess controlmemoirsgatekeepersystem