시스템 변수 U

• UCSAXISANG
• UCSBASE
• UCSDETECT
• UCSFOLLOW
• UCSICON
• UCSNAME
• UCSORG
• UCSVIEW
• UCSVP
• UCSXDIR
• UCSYDIR
• UNDOCTL
• UNITMODE
• UPDATETHUMBNAIL
• USER1
• USERR1
• USERS1