Slope performs two-dimensional slope stability analysis to study circular or non-circular slip surfaces. The program uses the method of slices and offers a variety of established methods for calculating interslice forces. These methods include Fellenius or Swedish slip circle analysis, the Bishop horizontal or constant inclined inter-slice forces method, and for non-circular slip surfaces the equivalent Janbu methods are available. Also available is a variably inclined interslice force method which ensures that each slice is in equilibrium both vertically and horizontally. Program features include: * analysis of reinforcing elements - soil nails, rock bolts, ground anchors and geotextiles - to BS8007/BS8081 * a variety of means of specifying water pressure including hydrostatic below a phreatic surface, piezometric or Ru values * a variety of methods of specifying material shear strength including drained or undrained parameters which may vary with depth * a range of circle centres with variable radius or with all circles passing through a fixed point, or tangent to a surface; there is an option to extend the grid if required to find the minimum factor of safety * surface loads may be specified together with horizontal ground acceleration * full graphical output.