HND is equivalent to high school level, isn't it? You must have an undergraduate level or equivalent degree before you can apply for Master's program.

If HND in your country is equivalent to American bachelor's level, then you qualify to apply for Master's program. In that case, you may apply to following universities:

Truman State University
University of Wisconsin, La Crosse
University of Wyoming
Montana State University
Louisiana Tech University
North Dakota State University
Dickinson State University

These are some of the reputed universities that are popular among international students for Computer Science program.