File extensions beginning with b

File Extension Description
B Batch list
B Grand Theft Auto saved game
B1N Both mono and color binary screen image
B30 Printer font (JLaser - Cordata)
B8 Raw graphics file (one byte per pixel) plane two
BA Binary Archive
BAC Compiled BASIC
BAD Bad file
BAD File which covers bad blocks on disk volume (not to be moved)
BAK Backup file
BAL Music score
BALANCE Balance accounting sheet file
BAP Blaze Audio Wave Information File
BAR Horizontal bar menu object file
BAR Info Bar for GFX2EXE
BAR Broker Archive. Compressed file containing number of other files for deployment.[1]
BAS BASIC language source
BAT Batch file
BB Database backup
BBL Bibliographic reference file
BBM Brush
BBP Playlist
BBS Bulletin Board System announce or text info file
BBS Hudson-style messagebase
BC! Unfinished download
BCF Card data
BCH Batch process object file
BCH Datafile
BCO Outline font description
BCP Borland C++ makefile
BCT Backup dictionary
BCW Environment settings
BDB Bookends database
BDC Dictionary
BDEF Builder Definition
BDF Adobe Glyph Bitmap Distribution Format
BDF Binary update file
BDF Bitmap Distribution Format font file
BDF Datafile
BDM Videoclip
BDR Border
BDT Dictionary
BEZ Outline font description
BF Brainfuck sourcefile
BF2 Bradford 2 font
BFC Briefcase Win95
BFM Font metrics
BGA Bitmap graphics
BGI Borland Graphics Interface device driver
BH Blackhole
BI BASIC include file
BIB Bibliography (ASCII)
BIB Database - not compatible with TeX format
BIB Literature database
BIF Binary Image Format b&w graphics file
BIK Bink video file (RAD Video)
BIN Binary file, usually zero-start (.com analog)
BIN SGI Powerflip
BIN Text mode memory dump
BIO BioniX Wallpaper playlist file
BIT Bitmap X11
BK Faxbook
BK! Document backup
BKn Timed backup file for document window n
BKP Backup file
BKW Mirror image of font set
BLD BLoaDable picture
BLD SYSGEN Build procedure file
BLEND Blender3D Project File
BLG Backup Log
BLK Temporary file
BLP Blizzard Game Picture
BM BitMap graphics file
BM3 UIQ3 Phone backup
BMK Help Bookmarks
BMP OS/2 or Win graphics format (BitMap Picture)
BMT Ami Pro Button
BNA Data
BNK Adlib instrument bank file
BNR Graphics Banner
BOK Shamela Library book
BOO Book-format
BOO Compressed file ASCII archive created by BOO (msbooasm.arc)
BOO Boo programming language source file.
BOT Bot files, these go with JKB files
BPC Chart
BPP Backup application
BPT Bitmap fills file
BR Script
BRD Eagle Layout File
BRD Tanzzle board file
BRD Cadence Allegro board file
BRF Braille
BRK The Brake! Mailer REXX script
BS2 Archive
BSA Archive
BSC Compressed Apple II file archive created by BINSCII
BSC Database
BSC Pwbrmake object file
BSP Half-Life\Half-Life 2 map files
BSS Casio Phone base
BST BiblioTex file (BiblioTex=bibliography file)
BSY Busy flag
BTM Batch-to-memory (quick batch)
BTN Makeover Button file
BUFR Binary Universal Form for the Representation of Meteorological Data
BUG Bugs and Problems
BUN LucasArts Bundle File
BUP Backup file
BUT Button definitions
BUY Datafile format
BVn Overflow file below insert point in Doc n
BWB Spreadsheet application
BWR Beware (buglist)
BZ2 Archive
B_W Black and white graphics file