Tennis for Two was a game developed in 1958 on an analog computer, which simulates a game of tennis or ping pong on an oscilloscope. Created by American physicist William Higinbotham, it is important in the history of video games as one of the first electronic games to use a graphical display.

Higinbotham created Tennis for Two to cure the boredom of visitors to Brookhaven National Laboratory, where he worked. He learned that one of Brookhaven's computers could calculate ballistic missile trajectories and he used this ability to form the game's foundation. The game uses an oscilloscope as the graphical display to display the path of a simulated ball on a tennis court. The designed circuit displayed the path of the ball and reversed its path when it hit the ground. The circuit also sensed if the ball hit the net and simulated velocity with drag. Users could interact with the ball using an analog aluminum controller to click a button to hit the ball and use a knob to control the angle. Hitting the ball also emitted a sound. The device was designed in about two hours and was assembled within three weeks with the help of Robert V. Dvorak. Excluding the oscilloscope and controller, the game's circuitry approximately took up the space of a microwave oven.

William (Willy) A. Higinbotham (October 25, 1910 – November 10, 1994), an American physicist, is credited with creating one of the first computer games, Tennis for Two. Like Pong, it is a portrait of a game of tennis or ping-pong, but featured different game mechanics that have very little resemblance to the later game. As the Head of the Instrumentation Division at Brookhaven National Laboratory, he created it on an oscilloscope in 1958, to entertain visitors during visitor days at the national laboratory.

He helped fund the nuclear nonproliferation group, Federation of American Scientists, and served as its first chairman and executive secretary.

He earned his undergraduate degree from Williams College in 1932 and continued his studies at Cornell University. During 1941 William went to work on the radar system at MIT until 1943. During World War II, he worked at Los Alamos National Laboratory and headed the lab's electronics group in the later years of the war.

From 1974 until his death in 1994, Higinbotham served as the technical editor of the Journal of Nuclear Materials Management, published by the Institute of Nuclear Materials Management.