These layout programs, (more than 45), all pre-loaded in the Calculator, were designed for Shop, Field and Office use, primarily for layout in the Custom Sheet Metal Trade. However the programs can be used by most trades like Insulators,Welding, Plumbing, Pipe Fitters, Concrete, Masons, etc. If you’re not very skilled at pattern development or weak in math, this tool will allow you to compete with a seasoned layout professional. If you are already proficient in layout, this “tool” will cut your layout time by more than half, and save on material waste from a layout by hand from the start. REMEMBER YOU DON’T NEED TO KNOW THE MATH! I consider this “Programed Calculator” a very useful “tool” rather than a Calculator because it fits in your pocket and you can take it anywhere, on any job and use it on the spot for roof pitches, angles, finding large radius's, layouts etc. You can be a real asset to your company and increase your efficiency. You can also apply these programs to more than what they were intended for, just use your imagination!