With the emergence of naval aviation as a major new military technique, in 1926, Congress created the position of Assistant Secretary of the Navy (AIR) to oversee the Unites States' naval aviation forces.
The office changed its name several times. On February 6, 1959, the office was redesignated Assistant Secretary of the Navy (Research and Development). In April 1977, the name was changed to Assistant Secretary of the Navy (Research, Engineering and Systems).
Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Each square carries a letter. To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares.
Boggle gives you 3 minutes to find as many words (3 letters or more) as you can in a grid of 16 letters. You can also try the grid of 16 letters. Letters must be adjacent and longer words score better. See if you can get into the grid Hall of Fame !
English dictionary Main references
Most English definitions are provided by WordNet .
English thesaurus is mainly derived from The Integral Dictionary (TID).
English Encyclopedia is licensed by Wikipedia (GNU).