1) Kind of toy 
1. A method of teaching a dog weave poles where the dog is alternately pushed or pulled through the poles on leash; 2. A handler pressures the dog toward an obstacle (push) or calls the dog toward an obstacle (pull); See also Fast dog handling, and Slow dog handling.
During World War I, ships of the United States Lighthouse Service were transferred to United States Navy control. They were detahced form the U.S. Navy in 1919 and returned to U.S. Lighthouse Service control in 1919 ...
A marketing concept in which product is 'pushed' by a manufacturer with a special promotion (advertising, merchandising) and 'pulled' out of the store through customers' demand created by the promotion. 
A train formation where a locomotive at the rear can be controlled by the driver at the front.
A mode of operation whereby a locomotive-hauled train may be driven with the locomotive at the front, middle or back of the train. Also
a two-tube symmetrical arrangement in which the grid excitation voltages are opposite in phase.