A typical example of a Windows SharePoint Services 3.0 or Office SharePoint Server 2007 site.
Remember, this course covers how libraries work on Windows SharePoint Services 3.0 and Microsoft Office SharePoint Server 2007. If you check out a file using a previous version, you may experience things differently.
How do you know which version you have? This is a common question. Ask the person in charge of your site. If you are the person in charge, then ask the person who set up your server. That person is likely in your IT department.