Military snipers are heading into combat with sophisticated ballistics calculators to help them hit targets at 2,500 yards and beyond. Horus ATragMX software considers atmospheric conditions, gun data, ammunition, range, speed and muzzle velocity to calculate precise aiming solutions with "come-up" results – and even accounts for Coriolis and spin drift effects. ATragMX, loaded on a handheld computer made by TDS Recon, is easy to use and lightning-fast. The Recon meets the rigorous MIL-STD-810F military standard for drops, vibration, humidity, altitude and extreme temperatures. ATrag software is compatible with numerous handheld PDAs and PocketPCs and is also available in professional and sporting versions.