O.M.A.C.

O.M.A.C. is a Advanced Weapons project located within the Queen Consolidated archives. Upon taking a controlling interest in the company, Ray Palmer gains access to its blueprints and reviews them when Felicity Smoak travels to Central City to visit Barry Allen.

Of the pages Ray looks at, the designs include:
 * a medium range missile launcher
 * a tank
 * a flying drone

Season 3

 * (first appearance of name and of schematics)

Trivia

 * in the comics, the acronym originally stood for "One Man Army Corps"
 * a later version, the "Observational Metahuman Activity Construct", was co-opted by Checkmate, along with Brother Eye