This Book contains a comprehensive list of military terms and definitions. List of terms, acronyms, information, related to modern armor, artillery, infantry, weapons, and related military subject matter. For example, I would like to mention here some extract from this book as follows: -The full-time duty in the active military service of the combatants of the Indian Army Navy and Air Force includes members of the Reserve Components serving on active duty or full-time training duty, but does not include full-time National Guard duty. A tour of active duty for reserve personnel authorized from military and reserve personnel appropriations for work on active or reserve component programs. This includes annual screening, training camp operations, training ship operations, and unit conversion to new weapon systems when such duties are essential. Active duty for special work may also be authorized to support study groups, training sites and exercises, short-term projects, and doing administrative support functions. By policy, active duty for special work tours is normally limited to 179 days or less in one fiscal year. Tours exceeding 180 days are accountable against active duty end strength.