1-Shot Ballistics is the current incarnation of a ballistics program first written in 1985 with IBM Basic and ran on the first IBM PCs. It has gone through several major iterations since.
1987 converted to Quick Basic for use on PC.
1997 converted to Turbo-C and supported trajectory plots and cartridge comparisons for use on PC.
2001 converted to MFC (Microsoft Foundation Classes) to run under Windows.
2014 converted to Java and android.