Table B-1 lists the file types that have a specific meaning to the system or to certain programs. When you create a file for use with a particular program, you should assign the correct file type. If you do, the system has more information about the file and can attempt to perform the correct function after you type a minimum set of commands or switches. Normally, no penalty arises from assigning an undefined file type, but if you assign an incorrect file type, the system may incorrectly interpret the file, especially when you use the LOAD-class commands.
Table B-1: Standard File Types
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File Type Kind of File Meaning
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68C Source Source file in the COBOL-68
language
74C Source Source file in the COBOL-74
language
A10 ASCII ASCII version of a
DECSYSTEM-20 program loaded
by the PDP-11
A11 ASCII ASCII version of a PDP-11
program loaded by the PDP-11
ABS Object Absolute (nonrelocatable)
program
AID Source Source file in AID language
ALG Source Source file in ALGOL
language
ALP ASCII Printer forms alignment
ATO ASCII PTYCON automatic command
file
ATR Binary Attribute file in SIMULA
language
AWT Binary Data for automatic wire
tester
BAK Source Backup file from TECO
B10 Source Source file in the BLISS-10
language
B20 Source Source file in the
BASIC-PLUS-2/20 language
B36 Source Source file in the BLISS-36
language
BAS Source Source file in BASIC
language
BCM ASCII Listing file created by
FILCOM (binary compare)
BCP Source Source file in BCPL language
BFR ASCII Copy of VTECO buffer
BIN Binary Binary file
BIX ASCII Output of the DSR program
for input to the TCX program
BLB ASCII Blurb file
BLI Source Source file in BLISS-10
language
BOX ASCII Output of BOX program -
picture for use in
specifications and manuals
BTC ASCII Output of the DSR program
for input to the TOC program
BUG Object Saved to show a program
error
BWR ASCII Beware file listing warnings
about a file or program
C68 Source Source file in the COBOL-68
language
C74 Source Source file in the COBOL-74
language
CAL Object CAL data and program files
CBL Source Source file in COBOL-68 or
COBOL-74 language
CCL ASCII Command file for LINK
CDP ASCII, Binary Spooled output for card
punch
CED ASCII Input to COPYED
CFL ASCII RUNFIL command file
CKP Binary Checkpoint core image file
created by COBOL operating
system
CHN Object CHAIN file
CMD ASCII Command file
COB ASCII COBOL Source File
COR ASCII Correction file for SOUP
CPY Binary Copy of a crash written by
SETSPD
CRF ASCII CREF (cross-reference) input
file
CTL ASCII Batch control file
DAT ASCII, Binary Data (FORTRAN) file, output
file with ANSI carriage
control
DCT ASCII Dictionary of words
DIR ASCII Directory from DIRECTORY
command
DMP ASCII COBOL compiler dump file
DOC ASCII Listing of modifications to
the most recent version of
the software
DRW Binary Drawing for VB10C drawing
system
ERR ASCII Error message file
EXE Object Executable program
FAI Source Source file in FAIL language
FCL Source Source file in FOCAL
language
FLO ASCII English language flowchart
FOR Source Source file in FORTRAN
language
FRM ASCII Blank form for handwritten
records
FTP Source FORTRAN test programs
GND ASCII List of ground pins for
automatic wirewrap
HGH Object Nonsharable high segment of
a TOPS-10 two-segment
program
HLP ASCII Help text files
IDA ASCII, Binary COBOL ISAM data file
IDX ASCII,SIXBIT Index file of a COBOL ISAM
file
INI ASCII, Binary Initialization file
L36 Object LIBRARY object file for the
BLISS-36 language
LAP ASCII Output from the LISP
compiler
LIB ASCII COBOL source library
LOG ASCII Batch, PTYCON or LINK log
file
LOW Object Low segment of a TOPS-10
two-segment program
LPT ASCII Spooled output for line
printer
LSP Source Source file in LISP language
LST ASCII Listing data created by
assemblers and compilers
MAC Source Source file in MACRO
language
MAN ASCII Manual (documentation) file
MAP ASCII LINK map file
MEM ASCII Formatted text file produced
by the DSR program
MID Source Source file in MIDAS (MIT
Assembler) language
MIM Binary Snapshot of MIMIC simulator
MSB Object MUSIC compiler binary output
MUS Source MUSIC compiler input
N Source Source file in NELIAC
language
NEW All New version of a program or
file
OBJ Object PDP-11 relocatable binary
file
OLD Source, Object Backup source program
OPR ASCII Installation and assembly
instructions
OVR Object COBOL overlay file
P11 Source Source program in MACX11
language
PAL Source Source file in PAL 10 (PDP-8
assembler)
PAS Source Source file in the PASCAL
language
PCO ASCII Program change order
PL1 Source Source file in PL1 language
PLM ASCII Program logic manual
PLO Binary Compressed plot output
PLT ASCII Spooled output for plotter
PPL Source Source file in PPL language
PTP ASCII, Binary Spooled output for
paper-tape punch
Qxx ASCII Edit backup file
R36 Source LIBARY source file for the
BLISS-36 language
RAM ASCII DECSYSTEM-20 microcode
REL Object Relocatable binary file
REQ Source LIBARY source file for the
BLISS-36 language
RIM Object RIM loader file
RNO ASCII Programming specifications
in DSR input
RSP ASCII SCRIPT response time log
file
RSX All Files for RSX-11
RUN ASCII Command file for SYSJOB
SAI Source Source file in SAIL language
SAV Object Low segment from a
one-segment TOPS-10 program
SCD ASCII Differences in directory
SCM ASCII Listing file created by
FILCOM (source compare)
SCP ASCII SCRIPT control file
SEQ ASCII, SIXBIT Sequential COBOL data file,
input to ISAM program
SHR Object A TOPS-10 sharable program
SIM ASCII Source file in SIMULA
language
SMP Source Source file in SIMPLE
language
SNO Source Source file in SNOBOL
language
SPC ASCII Corrected file for SPELL
program
SPD ASCII Dictionary for SPELL program
SPM ASCII File of mispelled words for
SPELL program
SPT ASCII SPRINT - created files
SPU ASCII File of uppercase words for
SPELL program
SPX ASCII File of exception (error)
lines for SPELL program
SRC ASCII Source files
STB Symbol table file
STD ASCII Standards
SYM Binary LINK symbol file
SYS Binary Special system files
TEC ASCII TECO macro
TEM ASCII, Binary Temporary files
TMP ASCII, Binary Temporary files
TPB ASCII Typeset input for producing
a .BLB file
TPC ASCII Typeset input for producing
a .CCO file
TPD ASCII Typeset input for producing
a .DOC file
TPE ASCII Typeset input for producing
error message text
TPH ASCII Typeset input for producing
a .HLP file
TPL ASCII Typeset input for producing
a logic manual
TPM ASCII Typeset input for producing
a .MAN file
TPO ASCII Typeset input for producing
a programming specification
TPP ASCII Typeset input for producing
an .OPR file
TSK Object An RSX-11 task image
TST All Test data
TV ASCII Command file for TV
TXT ASCII Text file
UPD ASCII Updates flagged in margin
(FILCOM)
WCH ASCII SCRIPT monitor (WATCH) file
WRL ASCII Wirelist
XOR Binary Module data for XOR tester
XPN Object Expanded save file (FILEX
and LINK)
Zxx ASCII EDIT original file (all xx)
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