They are in a bound format published by and for the US Army, distribution is limited Published in two volumes- Volume 1 shows Active duty Officers only, more of a bio format Volume 2 shows Active, NG, USAR and other officers, the format is basic info only Not found in military bookstores Sometimes found at used bookstores in the military section Most of mine were found on eBay, one was found in a used bookstore There are Navy and Marine registers as well, but harder to find