There's a jQuery plugin named DataTables. There's a .NET class named DataTable.
There are SO tags named datatables and datatable, both of which describe the jQuery DataTables plugin.
A number of posts (here, here, and here are good examples) are tagged datatable and use the .NET DataTable, yet there's the occasional question (like this one which is tagged datatable and actually refer to the jQuery DataTables.
Similarly, there are .NET DataTable questions that are tagged datatables (like this one).
To throw more confusion into the loop there's also a Yahoo UI plugin named DataTable, which is seen in this question.
It's all so convoluted.
How's this for a solution: jQuery DataTables questions go under datatables, .NET DataTable questions go under datatable, and YUI DataTable questions go under... uh, I dunno, yui-datatable?
Whatever happens, datatables and datatable should not be synonyms, even if their info pages seem to suggest they are (and I think I'm going to go edit the datatable info page after this).