     EXTENSION       WHAT IT (USUALLY) MEANS
	@nn		File created by the BACKUP command
	xx@		Compressed file on an OS/2 installation diskette
	AIx		MS-Windows Application Interface Driver
	APP		SQL Windows Application File
	ARC		Archive file output by some archive program
	ASM		Assembler input for MACRO Assembler
	BAK		Editor program backup copy of text file
	BAS		BASIC language source program
	BAT		A batch file for DOS
			(The BATCH_COMMANDS topic talks about batch files.)
	BGI		Borland Graphics Interface file
	BI 		SQL Database Before Image File
	BIN		Binary image version of an executable object file
	BMP		MS-Windows BitMaP files, ICONEDIT format
	C		C language source program
	CAL		A spreadsheet file in SuperCALC format
	CBL		COBOL language source program
	CCL		inTalk - CCL script files
	CFG		A configuration file for some program
	CGM		A graphics file in Computer Graphics Metafile format
	CMD		A batch file for OS/2
	CNF		A configuration file for some program
	COB		COBOL language source program
	COM		A program in COMmand image format (small and fast)
	CP2		A file containing data normally used only by CopyII PC 
	CPI		A file containing Code Page Information
	CSV		A text file in comma separated variable format
	CUR		MS-Windows CURsor files, ICONEDIT format
	DAT		A data file
	DBF		A database file in dBASE format
	DBS		SQL Database File
	DCP		A Display Code Page file for OS/2
	DCT		Hyphenation dictionary file or a word processor
	DIF		A spreadsheet file in Data Interchange Format
	DLL		A Dynamic Link Library for OS/2
	DOC		A file containing documentation for some program
	DRV		A program used to control (drive) a peripheral device
	DRW		A graphics file for MS-Windows Draw
	DXB		A file for computer aided drawing programs (also DXF)
	EPS		A graphics file in Encapsulated PostScript format
	EXE		A program in EXEcutable load module format (large)
	FNT		MS-Windows font files, FONTEDIT format
	FON		MS-Windows font files, GDI loadable format
	FOR		FORTRAN language source program
	GEM		A graphics file for Graphics Environment Manager (GEM)
	H		C language include file
	HLP		A help file for some program
	ICO		MS-Windows ICOn files, ICONEDIT format
	IMG		Datacopy high-resolution scanned image
	INC		PASCAL language include file
	INI		Initialization files (e.g., WIN.INI)
	LIB		Linker library file
	LST		Source output listing from some compiler
	MAC		Macro input file
	MAK		A make file for some program
	MAP		Linker listing file
	MEU		A file containing menu displays
	MOS		A mouse driver program
			(The CONFIG.SYS DEVICE topic talks about drivers.)
	MSP		MS-Windows Paint files
	NDX		An index file in dBASE format
	OBJ		Object code output by some complier
	OVR		File overlay to be used with a EXE or COM file
	PAS		PASCAL language source program
	PAK		Archive file output by some archive program
	PCO		A PC-Outline file
	PCX		Z-Soft's PC Paintbrush files (also .PCC)
	PFM		MS-Windows Printer Font Metric files
	PIC		A graphics file for LOTUS-1-2-3, old MS-Windows Draw
	PIF		MS-Windows Program Information File
	PRG		A program for dBASE III PLUS
	PRN		A text file formatted for the printer
	PUB		PageMaker PUBlication files
	RBS		A database file in R:base format
	RXF		A database file in Reflex format
	SLK		A spreadsheet file in SYLK format
	SYL		A spreadsheet file in SYLK format
	SYS		A system file, probably in binary image format
			(The CONFIG.SYS DEVICE topic talks about .SYS files)
	TIF		A graphics file in Tagged Image File format
	TMP		A temporary file
	TXT		A text file
	WK1		A spreadsheet file in LOTUS-1-2-3 format (also WKS)
	WMF		PageMaker-compatible MS-Windows Metafiles
	WRI		MS-Windows Write Document File
	XLC		A spreadsheet file in Excel format (also XLM, XLS, XLW)
