Snipers And Their Shooting
"April 11, 2009: U.S. Army and Marine Corps are getting handheld ballistic computers. The device also has Blue Tooth and WiFi, as well as a speaker and microphone. The software handles things like weapon model, target speed and range estimation, wind speeds and many other factors.
A cheaper solution uses an iPhone. BulletFlight software is available at the iPhone software store, and it performs the calculations needed to account for atmospheric conditions (wind, temperature, humidity, altitude and barometric pressure) for long range shooting. The output tells you how many clicks to adjust your scope to make the shot more accurately. Before use, you input basic data like rifle type and bullet weight."