objects,geometry,lights,cameras,helpers,shapes,systems,spacewarps,selection

Iterate through objects in scene with these object sets:
[1]    objects -- all the objects
[2]    geometry -- the standard 3ds Max categories...
[3]    lights
[4]    cameras
[5]    helpers
[6]    shapes
[7]    systems
[8]    spacewarps
[9]    selection -- the current selection

Use these to iterate through all of one type of object in maxscript:
Example:
        For geo in geometry do(
            geo.pos = [0,0,0];
        )--[x]