Multi-purpose calculator which also includes

• hexidecimal and octal from decimal conversions
• binary to decimal conversions
• quadratic formula
• area of a circle
• area of a triangle
• metric to U.S. conversions
• U.S. to metric conversions
• polar to rectangular and rectangular to polar conversions
• finding the equation and slope of a line
• finding the intersection point of two non parallel lines
• determinants

Look at the readme file from the program.