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Computer file containing no data
A zero-byte file or zero-length file is a computer file containing no data. As the size (a.k.a. length) of a file is often measured in bytes, such a file
Zero-byte_file
Unicode character
The byte order mark (BOM) is a particular usage of the special Unicode character code, U+FEFF ZERO WIDTH NO-BREAK SPACE, whose appearance as a magic number
Byte_order_mark
Computer file containing plain text
is a case of zero-byte file. The ASCII character set is the most common compatible subset of character sets for English-language text files, and is generally
Text_file
Windows Bitmap image file format family
image independently of the display device; a BMP file wraps such a DIB in an additional 14-byte file header. It originated in the closely linked early
BMP_file_format
Efficient variable-length integer encoding
store arbitrarily large integers in a small number of bytes. LEB128 is used in the DWARF debug file format and the WebAssembly binary encoding for all integer
LEB128
Computer resource for recording data on a storage device
Filename Flat-file database Object composition Soft copy Unix file type Zero byte file "file". Oxford English Dictionary (online ed.). Oxford University
Computer_file
Image file format with multiple editions
followed by a byte equal to 0, and specifies that this must be the first segment in the file, hence making it simple to recognize a JFIF file. Exif images
JPEG_File_Interchange_Format
Family of archive file formats
744,073,709,551,615 bytes (264 − 1 bytes, or 16 EiB minus 1 byte). .ZIP file format includes an extra field facility within file headers, which can be
ZIP_(file_format)
Encoding for a sequence of byte values using 64 printable characters
treated as zero for encoding and discarded for decoding (along with the trailing = padding character). If the input consists of a number of bytes that is
Base64
File system used by MS-DOS and Windows 9x
of zero. Additionally, for FAT IDs other than 0xFF (and 0x00) it is possible to determine the correct nibble and byte order (to be) used by the file system
File_Allocation_Table
Computer file to test antivirus software
compressed file. Many of the AMTSO Feature Settings Checks are based on the EICAR test string. The file is a text file of between 68 and 128 bytes that is
EICAR_test_file
Windows icon file format
non-animated cursors in Microsoft Windows. The two differ only in the bytes that identify the file and in a hotspot recorded in the CUR header — the pixel offset
ICO_(file_format)
File format for 3D printing and scanning
these follows a 2-byte ("short") unsigned integer that is the "attribute byte count" – in the standard format, this should be zero because most software
STL_(file_format)
File format and file archiver program
bytes. The header uses 257 bytes, then is padded with NUL bytes to make it fill a 512 byte record. There is no "magic number" in the header, for file
Tar_(computing)
Compound document file format
reserved, must be zero ULONG _ulReserved1; // [24H,04] reserved, must be zero FSINDEX _csectDir; // [28H,04] must be zero for 512-byte sectors, // number
Compound_File_Binary_Format
File format for executables, object code, shared libraries, and core dumps
the subtype value is the file type value. After the file type value is the number of load commands and the total number of bytes the load commands are after
Mach-O
File format and file compression program
A gzip file (described in the table below) consists of a 10-byte header, optional extra header fields, Deflate-compressed data, and an 8-byte trailer
Gzip
Computer file encoded in binary form
If the file is opened in some other application, that application will have its own use for each byte: maybe the application will treat each byte as a number
Binary_file
File format for conveying binary information
sequence of n bytes of data, represented by 2n hex digits. Some records omit this field (n equals zero). The meaning and interpretation of data bytes depends
Intel_HEX
Type of computer file
reading sparse files, the file system transparently converts metadata representing empty blocks into "real" blocks filled with null bytes at runtime. The
Sparse_file
Software-based, block-level cache of drive data stored in the host computer's main memory
modifications are done. A file that is created or opened in the page cache, but not written to, might result in a zero-byte file at a later read. However
Page_cache
Geospatial vector data format
of a feature in 4D space. The main file header is fixed at 100 bytes in length and contains 17 fields; nine 4-byte (32-bit signed integer or int32) integer
Shapefile
with value zero), so NUL is not considered in the table below, even if the text says “Any byte”. List of file systems Comparison of file archivers List
Comparison_of_file_systems
Way in which data is arranged and accessed in computer memory
address specifies a different byte. An n-byte aligned address would have a minimum of log2(n) least-significant zeros when expressed in binary. The alternate
Data_structure_alignment
Character in text processing
zero-width no-break space (ZWNBSP, U+FEFF), as a usage of the no-break space of zero width. The ZWNBSP is originally and currently used as the byte order
Word_joiner
Encoding method for variable-length integers
a sequence of bytes. The number of bytes that is needed depends on the value being represented, with larger magnitudes using more bytes than smaller ones
Variable-length_integer
Raster graphics file format
ID in the file footer. If a TGA file contains a footer, it is likely to be a TGA version 2 file. The footer is the final 26 bytes of the file, of which
Truevision_TGA
Toolkit for manipulation of images
fixes created by other developers. Each file starts with a two-byte magic number in ASCII that identifies the file type (PBM, PGM, or PPM) and its encoding
Netpbm
20 bytes. Some preceding "negative offset" bytes were squeezed from reserved spaces in CP/M Zero Page and DOS Program Segment Prefix for storing file attributes
File_Control_Block
Numeric value with an unclear meaning
about the file. PNG image files begin with an 8-byte signature which identifies the file as a PNG file and allows detection of common file transfer problems:
Magic_number_(programming)
Type of simple executable file
the first byte of a COM file is C9h, there is a 256-byte header; since C9h corresponds to the 8080 instruction RET, this means that the COM file will immediately
COM_file
File format and file compression program
represent byte values 3 and 0 respectively. Runs of symbols are always transformed after 4 consecutive symbols, even if the run-length is set to zero, to keep
Bzip2
Data serialization format
peer-to-peer file sharing system BitTorrent for storing and transmitting loosely structured data. It supports four different types of values: byte strings
Bencode
Lossless data compression software
0 for i, byte in enumerate(buf): if i > 8: raise ValueError("num must not have more than 63 bits") num |= (byte & 0x7f) << (i * 7) if byte & 0x80 ==
XZ_Utils
Standard file format for executables, object code, shared libraries, and core dumps
platforms. Each ELF file is made up of one ELF header, followed by file data. The data can include: Program header table, describing zero or more memory segments
Executable and Linkable Format
Executable_and_Linkable_Format
Method of encoding characters in a URI
representing the character's byte value. For example, a space is commonly encoded as %20: original: http://example.com/my file.txt encoded: http://example
Percent-encoding
Family of lossless-compression image file formats
to display PNG images of 4097 or 4098 bytes in size. 6.0 cannot open a PNG file that contains one or more zero-length IDAT chunks. This issue was first
PNG
the command processor. Thus, its output can be redirected to create a zero-byte file. REM is useful in logged sessions or screen-captures. One might add
List_of_DOS_commands
Shell command for reporting available file system space
reported in blocks of 512 bytes, and that at a minimum, it reports the file system names and the amount of free space. Using 512-bytes as the unit of measure
Df_(Unix)
Principal protocol used for transmission of datagrams across an IP network
possible to have UDP datagrams of size greater than 65,535 bytes. The length field is set to zero if the length of the UDP header plus UDP data is greater
User_Datagram_Protocol
Data encoding standard
value is two bytes: a zero and a three. In your application, you would have previously agreed to a) use one-byte keys and b) use one-byte length encoding
KLV
Computer worm
C, C++, and assembly language source files on the user's hard drive by overwriting them with zero-byte files. "Worm.ExploreZip". Symantec.com. May 1
ExploreZip
Series of image file formats
279 (StripByteCounts). The StripOffsets point to the blocks of image data, the StripByteCounts say how long each of these blocks are (as stored in the file),
TIFF
Lossless data compression
scheme can be used in TIFF files. TGA files also use this RLE compression scheme, but treats data stream as pixels instead of bytes. Packbit compression was
PackBits
be present in the same file). The first 256 bytes of the data group must be zero. They will be populated by CP/M-86 with the zero page (comparable to the
CMD_file_(CP/M)
Logical or physical division of storage media
traditionally 512 bytes for hard disk drives (HDDs), and 2048 bytes for CD-ROMs, DVD-ROMs and BD-ROMs. Newer HDDs and SSDs use 4096 byte (4 KiB) sectors
Disk_sector
File format developed by Motorola
"An S-record file consists of a sequence of specially formatted ASCII character strings. An S-record will be less than or equal to 78 bytes in length".
Motorola_S-record
New IBM Mainframe computer object module file format
must use fixed-length (80-byte) records. Records in fixed-length files that are shorter than the fixed length should be zero-filled. To distinguish GOFF
GOFF
Lossy compression method for reducing the size of digital images
how an image is compressed into a stream of bytes and decompressed back into an image, but not the file format used to contain that stream. The Exif
JPEG
Encoding for a sequence of byte values using 85 printable characters
mark a sequence of four zero bytes. When encoding, each group of 4 bytes is taken as a 32-bit binary number, most significant byte first (Ascii85 uses a
Ascii85
Structure of information stored on a computer
abstraction including low-level bit and byte layout as well high-level organization such as markup and tabular structure. A file format may be standardized (which
File_format
Adding data to a message prior to encryption to hide its length
the original file ends with one or more zero bytes, which makes it impossible to distinguish between plaintext data bytes and padding bytes. It may be used
Padding_(cryptography)
Distributed file system protocol
associated with NFS. Note: the byte-range advisory Network Lock Manager (NLM) protocol (added to support UNIX System V file locking APIs) the remote quota-reporting
Network_File_System
Esoteric, minimalist programming language
binary with a size of 296 bytes. He uploaded the first Brainfuck compiler to Aminet in 1993. The program came with a "Readme" file, which briefly described
Brainfuck
Shell command for copying and converting file data
For example, this overwrites the first 512 bytes of a file with null bytes: dd if=/dev/zero of=path/to/file bs=512 count=1 conv=notrunc Option conv=notrunc
Dd_(Unix)
Interface to device driver that appears in filesystem
characters (zero-value bytes) as output when read from. /dev/full – produces a continuous stream of null characters (zero-value bytes) as output when read
Device_file
Bitmap image file format family
The two versions can be distinguished by looking at the first six bytes of the file (the "magic number" or signature), which, when interpreted as ASCII
GIF
Variable-width encoding of Unicode, using one or two 16-bit code units
an earlier obsolete fixed-width 16-bit encoding now known as UCS-2 (for 2-byte Universal Character Set), once it became clear that more than 216 (65,536)
UTF-16
Small file that represents another file
file name string < 63 chars then pad with zeros) 4 bytes file number = long unsigned HFS value 4 bytes file created mac date = long unsigned value in
Alias_(Mac_OS)
starts with a header of four zero-bytes (tested all icns files in macOS 10.15.7 and macOS 11). Usage unknown, the four zero-bytes can be any value and are
Apple_Icon_Image_format
DBASE database file format family
removes the message, but does not decrypt the file. The maximum number of fields is 255. n means the last byte in the field descriptor array. The array's
.dbf
Unix philosophy
the filesystem, each file reports a size of 0 or PAGE_SIZE, even though reading the data will yield a different number of bytes. First in Version 4 Unix
Everything_is_a_file
Raster graphics file format
to top. File Signature/Magic Number Should equal 0x01 0xda for SGI file. Compression 0 if the file is uncompressed; 1 for RLE compression. Bytes Per Pixel
Silicon_Graphics_Image
Computer operation which manipulates invidual bits of data
right-shifted s bit positions with zero-extension. In bit and shift operations, the type byte is implicitly converted to int. If the byte value is negative, the highest
Bitwise_operation
Image file format
rgb4_byte, bgr4_byte, gray, pal8, and monob. There is a multi-page version of PCX, used by some computer fax and document management programs, with file extension
PCX
Proprietary file system developed by Microsoft
on the size of individual files is 16 EB (16 × 10246 or 264 bytes) minus 1 KB, which totals 18,446,744,073,709,550,592 bytes (18.4 EB). With Windows 10
NTFS
Type of data compression and archival format
file. Component files are stored sequentially within an archive, followed by an end-of-archive marker 0x1A 0x00. Each entry is preceded by a 29-byte header
ARC_(file_format)
Computer programming method
appropriate structural components. read a byte remember byte set counter to zero increment counter output remembered byte output counter Also, at this stage
Jackson structured programming
Jackson_structured_programming
Operating system for Tandy TRS-80 computers
Set) file and if a backup has been made, the relative number of the last sector in the file, and the last byte within the last sector (or End Of File). The
TRSDOS
Shell command for reporting file type information
FIFO, socket, block special file, and character special file A zero-length file is reported as such An initial part of file is considered and the command
File_(command)
Password-based key derivation function
to 56 bytes (including a terminating zero byte when the key is an ASCII string)." Note that the quote above mentions passwords "up to 56 bytes" even though
Bcrypt
Signal in the system bus of an x86-based computer system
byte-addressable physical space requires 32 lines (log2(4 GB) = log2(232 B) = 32), which are named A0 through A31. The lines are named after the zero-based
A20_line
Convention to identify bit positions
the bit positions in a binary number. The bits can be those in a memory byte or word, or those of an internal CPU register or data bus. In computing,
Bit_numbering
8-bit microprocessor
until BC reaches zero. Non-repeating versions LDI and LDD move a single byte and bump the pointers and byte counter, which if it becomes zero resets the P/V flag
Zilog_Z80
Class of computer memory address reference
pointer.[unreliable source?] Most architectures are byte-addressable (the smallest addressable unit is a byte), but certain types of data will often be aligned
Tagged_pointer
Message-digest hashing algorithm
input bytes are considered as bit strings, // where the first bit is the most significant bit of the byte. // Pre-processing: padding with zeros append
MD5
Symbol "#!", used in computing
actually a human-readable instance of a magic number in the executable file, the magic byte string being 0x23 0x21, the two-character encoding in ASCII of #
Shebang_(Unix)
First sector of partitioned PC computer disk
tools, backup and file system utilities and other software had this value hard-coded. Since the end of 2009, disk drives employing 4096-byte sectors (4Kn or
Master_boot_record
Instruction set extension by Intel
that operate on bytes or words are available only with the AVX-512BW extension (byte & word support). The width of the SIMD register file is increased from
AVX-512
Form of binary-to-text encoding
length, with the grave accent signifying zero bytes. As a complete file, the uuencoded output for a plain text file named cat.txt containing only the characters
Uuencoding
Series of 16-bit computers by Texas Instruments
word) MOVB (move byte) A (add word) AB (add byte) S (subtract word) SB (subtract byte) C (compare word) CB (compare byte) SZC (set zeros corresponding word)
TI-990
Internet protocol that uses a proxy server
of SOCKS4. The client should set the first three bytes of DSTIP to NULL and the last byte to a non-zero value. (This corresponds to IP address 0.0.0.x,
SOCKS
Smart card
byte[] HELLO_APPLET_AID = { (byte)0xA0, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x62, (byte)0x03, (byte)0x01, (byte)0x0C, (byte)0x01 }; protected HelloWorldApplet()
Java_Card
File format
of zero bytes, which will be very common, can be ignored, as an exclusive or of any byte value to a byte of zero will not alter the original byte value
ANIM
Lossless compression algorithm
for fast compression and decompression. It belongs to the LZ77 family of byte-oriented compression schemes. The LZ4 algorithm provides a good trade-off
LZ4_(compression_algorithm)
64-bit RISC instruction set architecture
contains a longword-aligned virtual byte address, that is, the low two bits of the program counter are always zero. The PC is incremented by four to the
DEC_Alpha
Lost data in computing
2020-02-27. [3] (NB. Digital Research's ASM-86 uses token 'Z' (for "zero") to indicate the byte bucket.) "Chapter 3.1.2. Outputs". Software fault injection:
Bit_bucket
File transfer protocol
and file length, in a complete 128-byte packet. XMODEM started transfers with packet number one, so TeLink sent this packet as number zero. This "zero packet"
YMODEM
128-bit number used to identify information in computer systems
for about 86 years. A file containing this many UUIDs, at 16 bytes per UUID, would be about 43.4 exabytes (37.7 EiB) -- a file, listing only identifiers
Universally_unique_identifier
Data structure in DOS
programs to move CP/M programs to CP/M-86 and MS-DOS] (PDF). BYTE. Vol. 7, no. 6. BYTE Publications Inc. pp. 321–322, 324, 326, 328, 330, 332, 334, 336
Program_Segment_Prefix
Code intended as a payload to exploit a software vulnerability
via the usual algorithm (i.e. strcpy) of ending the copy at the first zero byte – called the null character in common character sets. If the shellcode
Shellcode
File format family developed by CRI Middleware
either unknown data or are apparently just reserved (i.e. filled with null bytes). Fields labelled with 'v3' or 'v4' but not both are considered "Unknown"
ADX_(file_format)
Two-dimensional matrix barcode
can be text or numeric data. The usual data size is from a few bytes up to 1556 bytes. The length of the encoded data depends on the number of cells in
Data_Matrix
Computer network performance metric
and 1000000000 (giga). File sizes are typically measured in bytes — kilobytes, megabytes, and gigabytes being usual, where a byte is eight bits. In modern
Measuring_network_throughput
Device file in Unix-like operating systems
special file that always returns the error code ENOSPC (meaning "No space left on device") on writing, and provides any number of zero bytes to a process
/dev/full
Datum of integral data type
2 on page 12" (PDF). ecma-international.org. VB 6.0 help file "The Integer, Long, and Byte Data Types (VBA)". microsoft.com. Retrieved 2006-12-19. Giguere
Integer_(computer_science)
Handling of strings in the C programming language
ends at the first occurrence of the zero code unit of the appropriate kind (char or wchar_t). Consequently, a byte string (char*) can contain non-NUL characters
C_string_handling
Instruction set of the Java virtual machine
bytecode is composed of one byte that represents the opcode, along with zero or more bytes for operands. Of the 256 possible byte-long opcodes, as of 2015[update]
JVM_bytecode
Computer access method
addresses are three byte fields in the form TTR. All subfields are binary numbers. TT is the relative track number in the file, starting with zero. R is the record
Basic_direct_access_method
(FSK) system, with binary zeros ("space") represented by one cycle of a 2 kHz signal, and ones ("mark") as a cycle of 0.8 kHz. Bytes were written with a single
List of Compact Cassette tape data storage formats
List_of_Compact_Cassette_tape_data_storage_formats
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ZERO BYTE-FILE
ZERO BYTE-FILE
Male
Finnish
Finnish form of German Erich, EERO means "ever-ruler."Â
Surname or Lastname
English
English : topographic name for someone who lived near a bend, for example in a river, from Middle English bye ‘bend’ (from Old English byge, a derivative of būgan ‘to bow’). Reaney suggests that occasionally it may be from an Old English personal name of obscure origin.Norwegian and Swedish : habitational name from any of various farms named By, from Old Norse býr ‘farm’.
Girl/Female
Assamese, Indian
Rounded
Boy/Male
African, Finnish, German
The Lord is Exalted
Surname or Lastname
English
English : variant spelling of Kite.
Male
Finnish
Short form of Finnish Antero, TERO means "man; warrior."
Female
Greek
(ἩÏá½¼) Greek name derived form the word hÄ“rÅs, HERO means "hero." In mythology, this is the name of the lover of Leandros (Latin Leander).
Boy/Male
Arabic, Australian, German, Greek, Kurdish
Empty; Void
Girl/Female
Latin Greek Shakespearean
Daughter of Priam.
Surname or Lastname
English and Scottish
English and Scottish : from the Middle English personal name Bat(t)e, a pet form of Bartholomew.
Surname or Lastname
English
English : perhaps a variant of Biss. Compare Beese, Bice, Bise, Buys.
Boy/Male
Arabic
Empty.
Male
Spanish
Spanish name derived from Latin juniperus, JUNÃPERO means "juniper tree."
Girl/Female
Latin
Mother of Asopus.
Boy/Male
Biblical
Root, that straitens or binds, that keeps tight.
Girl/Female
British, English
Girl
Surname or Lastname
English
English : unexplained; possibly a variant of Butt.
Boy/Male
English Irish
Bear; brown.
Male
Italian
 Short form of Italian Raniero, NERO means "wise warrior." Compare with another form of Nero.
Boy/Male
Greek
Rock.
ZERO BYTE-FILE
ZERO BYTE-FILE
ZERO BYTE-FILE
ZERO BYTE-FILE
ZERO BYTE-FILE
ZERO BYTE-FILE
ZERO BYTE-FILE
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