AutoCAD Commands
Explanations 
Absolute
Coordinates
CENTER
MARK
COPY
CYLINDER
GRID
EXTRUDE
HIDE
LAYER
Line
Scale (LTSCALE)
MOVE
MVSETUP
Object Snaps
(OSNAP)
OFFSET
PEDIT
Polyline
(PLINE)
Relative
Rectangular Coordinates
Relative
Polar Coordinates
REGEN
(Regenerate)
RENDER
REVOLVE
SOLDRAW
SOLVIEW
STRETCH
SUBTRACT
TRIM
UNION
User Coordinate
System (UCS)
VIEW
POINT
VPLAYER
ZOOM
XP