Actually delta time could mean many things. In the case of game development, it's the changing of time of the frames and delta time is a way to control it...sorta.
Also. according to this web site its states : "Delta Time is a photographic journey through the poorest communities of the Mississippi Delta."
http://www.kenlight.com/publications/deltatime/index.html
But you can't go wrong with Chuck Norris from DELTA Force :

And of course the real DELTA guys doing their thang (BTW, you did NOT see these guys):

And play some war games (actually this is Marine Force Recon....just thought it was cool to stick in)
Also. according to this web site its states : "Delta Time is a photographic journey through the poorest communities of the Mississippi Delta."
http://www.kenlight.com/publications/deltatime/index.html
But you can't go wrong with Chuck Norris from DELTA Force :

And of course the real DELTA guys doing their thang (BTW, you did NOT see these guys):
And play some war games (actually this is Marine Force Recon....just thought it was cool to stick in)