DCALC uses a simple and intuitive interface:

Opening DCALC, you will see an introduction screen

You will then choose from the above simple menu options.

To make a calculation, select from the menu...

...or, for bridge designs, select calculations from a flowchart.

After running a calculation program, you will view the calculation in the DCALC viewer, before final printing.

Many of DCALC programs also produce details for DesignCAD, a powerful and inexpensive CAD program compatible with many other CAD packages.