B-SPLINES:Curves that are constructed in 3d space.

AUTOMATED CURVES:An example of an automated curve would be a circle.

PRIMITIVES:An example of a primitive is a sphere.

EXTRUSION:Takes a curve or surface and expands it in a specific direction.

SURFACING:There are a variety of surfacing techniques that involve taking a curves and generating a surface with them.  These techniques include sweeps, lofts and curve networks.  They're all very similar.

REVOLVE:Creates a revolved surface from curves.
BOOLEAN WELD:Joins two objects together.

PROJECT:Makes it so the curves of the selected entities are drawn on the surface by relation to a construction plane.

SPLIT AND TRIM:Split divides a surface or curve where the selected entities intersect.  Trim deletes the part of the surface that intersect.

MIRROR AND ARRAYS:Duplicates surfaces or curves by reflecting and translating about vectors.

DUPLICATE:As simple as copy and paste.

JOIN AND EXPLODE:Joining is for taking surfaces that touch but dont overlap and join them together.  Or for making 2d curves that intersect join together.  Explode is for dividing a surface into smaller surfaces.  Explode is also for reverting joined curves back to their original.

SNAP POINTS:Used to construct or translate something directly on or about a specific point.  One example of a point you can snap to is center.

CONTROL POINTS:Used to edit a surface or curve after it has been constructed.

MOVE SCALE AND ROTATE:Pretty self explanatory.

UNDO AND REDO:Pretty self explanatory.