PLL file extension is for Computer Associates Clipper Pre-Linked Library
Similar to PLL
3DM - QuickDraw 3D Metafile QuickDraw3DMF - QuickDraw 3D Metafile QuickDraw
3DS - Graphics Autodesk 3D Studio
3FX - 3D effects CorelChart
3gp - Video format compatible with mobile devices
3GR - VGA graphics driver Windows Video grabber
3T4 - Util3 Binary file converter to ASCII
View all in File Extensions