What does NPD stand for?

NPD stands for "NASA Procedural Directive"

How to abbreviate "NASA Procedural Directive"?

"NASA Procedural Directive" can be abbreviated as NPD

What is the meaning of NPD abbreviation?

The meaning of NPD abbreviation is "NASA Procedural Directive"

What does NPD mean?

NPD as abbreviation means "NASA Procedural Directive"