This word cloud shows the scripting names of the commands in Application.Commands (Softimage 2013 SP1)

You can see that some scripting names are repeated quite a few times:

• ApplyTopoOp (66)
• ApplyOp (47)
• ApplyGenOp (44)
• ToggleValue (43)
• ApplyShader (37)

Some scripting commands, like Insert Curve Knot, are instances of a generic command like ApplyTopoOp:

but with hard-coded arguments:

See also Why ApplyOp doesn’t pop up a PPG.

Here’s a list of the TopoOp commands:

for c in Application.Commands:
	if c.ScriptingName == "ApplyTopoOp":
		print "%s : %s" % (c.ScriptingName, c.Name )
		
# ApplyTopoOp : Apply Topology Operator
# ApplyTopoOp : Insert Curve Knot
# ApplyTopoOp : Subdivide Edge
# ApplyTopoOp : Raise Nurbs Curve Degree
# ApplyTopoOp : Extrude Comp. Axis
# ApplyTopoOp : Filter Polygons
# ApplyTopoOp : Collapse
# ApplyTopoOp : Inset Polygons
# ApplyTopoOp : Subdivide Polygon
# ApplyTopoOp : Slice Polygons
# ApplyTopoOp : Offset Polygons
# ApplyTopoOp : Dice Object
# ApplyTopoOp : Surface Snip
# ApplyTopoOp : Invert Selected Polygons
# ApplyTopoOp : Delete Trim
# ApplyTopoOp : Duplicate Polygons Along Curve
# ApplyTopoOp : Curve Remove Knot
# ApplyTopoOp : Extrude Component Along Normal
# ApplyTopoOp : Dissolve Component
# ApplyTopoOp : Boolean Difference
# ApplyTopoOp : Boolean Union
# ApplyTopoOp : Boolean Intersection
# ApplyTopoOp : Local Subdivision
# ApplyTopoOp : Insert Surface Knot
# ApplyTopoOp : Remove Surface Knot
# ApplyTopoOp : Polygon Reduction
# ApplyTopoOp : Bevel
# ApplyTopoOp : Delete Component
# ApplyTopoOp : Quadrangulate
# ApplyTopoOp : Dissolve & Clean Adjacent Vertices
# ApplyTopoOp : Symmetrize Polygons
# ApplyTopoOp : Disconnect Component
# ApplyTopoOp : Set Curve Knot Multiplicity
# ApplyTopoOp : Bridge Edges
# ApplyTopoOp : Apply DelMeshPoint
# ApplyTopoOp : Invert All Normals
# ApplyTopoOp : Curve Inverse
# ApplyTopoOp : Surface Shift
# ApplyTopoOp : Curve Shift
# ApplyTopoOp : Surface Curve Shift
# ApplyTopoOp : Surface Swap
# ApplyTopoOp : Filter Edges
# ApplyTopoOp : Curve Reparameterize
# ApplyTopoOp : Surface Reparameterize
# ApplyTopoOp : Add Edge
# ApplyTopoOp : Add Polygon
# ApplyTopoOp : Nurbs Curve Delete Point
# ApplyTopoOp : Nurbs Surface Delete Point
# ApplyTopoOp : Mesh Surface Delete Point
# ApplyTopoOp : Surface Open/Close
# ApplyTopoOp : Curve Open/Close
# ApplyTopoOp : Delete Edge
# ApplyTopoOp : Surface Stitch
# ApplyTopoOp : Surface Extend to Curve
# ApplyTopoOp : Surface Clean
# ApplyTopoOp : Curve Stitch
# ApplyTopoOp : Curve Clean
# ApplyTopoOp : Surface Curve Inverse
# ApplyTopoOp : Extrude Component Along Curve
# ApplyTopoOp : Weld Edges
# ApplyTopoOp : Filter Points
# ApplyTopoOp : Weld Points to Target
# ApplyTopoOp : Delete Particle
# ApplyTopoOp : Trim by Projection
# ApplyTopoOp : Dice Polygons
# ApplyTopoOp : Bridge Polygon