시스템변수
- LOGFILENAME
- LOGFILEPATH
- LTSCALE
- LUNITS
- LUPREC
- LWDEFAULT
- LWDISPLAY
- LWUNITS
- MAXACTVP
- MBUTTONPAN
- MEASUREINIT
- MEASUREMENT
- MENUBAR
- MIRRTEXT
- MLEADERSCALE
- MTEXTCOLUMN
- MTEXTED
- MTEXTFIXED
- MTEXTTOOLBAR
- MTJIGSTRING
- THICKNESS
- OFFSETDIST
- OFFSETGAPTYPE
- OJBECTISOLATIONMODE
- OLEHIDE
- OLEQUALITY
- OLESTARTUP
- OPENPARTIAL
- OPMSTATE
- OSNAPCOORD