+{% include 'notebox_begin' %}
+This guide covers the classic Arvados Workbench web application, sometimes referred to as "Workbench 1". There is also a new Workbench web application under development called "Workbench 2". Sites which have both Workbench applications installed will have a dropdown menu option "Switch to Workbench 2" to switch between versions.
+
+This guide will be updated to cover "Workbench 2" in the future.
+{% include 'notebox_end' %}
+
+If you are using the "playground" Arvados instance for this guide, you can Access Arvados Workbench using this link:
+
+<a href="{{site.arvados_workbench_host}}/" target="_blank">{{site.arvados_workbench_host}}/</a>