Yes, HDR just refers to high dynamic range and it is usually done by combining several exposures from 1-3 stops over to 1-3 stops under the normal exposure and then tone mapping them in a program such as Photomatix and then some additional post processing in something like Photoshop.
That being said you can always do the HDR thing and create a nice color image and then just convert it to B&W in Photoshop.
My main complaint with some HDR work is that it just is overdone in my opinion and looks fake.
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