binary file


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binary file

[′bīn·ə·rē ′fīl]
(computer science)
A computer program in machine language that can be directly executed by the computer.

binary file

(file format)
Any file format for digital data that does not consist of a sequence of printable characters (text). The term is often used for executable machine code.

All digital data, including characters, is actually binary data (unless it uses some (rare) system with more than two discrete levels) but the distinction between binary and text is well established. On modern operating systems a text file is simply a binary file that happens to contain only printable characters, but some older systems distinguish the two file types, requiring programs to handle them differently.

A common class of binary files is programs in machine language ("executable files") ready to load into memory and execute. Binary files may also be used to store data output by a program, and intended to be read by that or another program but not by humans. Binary files are more efficient for this purpose because the data (e.g. numerical data) does not need to be converted between the binary form used by the CPU and a printable (ASCII) representation. The disadvantage is that it is usually necessary to write special purpose programs to manipulate such files since most general purpose utilities operate on text files. There is also a problem sharing binary numerical data between processors with different endianness.

Some communications protocols handle only text files, e.g. most electronic mail systems before MIME became widespread in about 1995. The FTP utility must be put into "binary" mode in order to copy a binary file since in its default "ascii" mode translates between the different newline characters used on the sending and receiving computers.

Confusingly, some word processor files, and rich text files, are actually binary files because they contain non-printable characters and require special programs to view, edit and print them.

binary file

A computer file format in which all eight bits of the byte are used for data. Executable software (machine language programs), most word processing, database, spreadsheet and multimedia files are binary files. However, text and source program files as well as HTML and XML files are ASCII text files, just plain text, not binary.

Attachments Must Be Encoded
The binary vs. ASCII distinction is made when attaching files via email. The Internet's SMTP mail protocol only supported seven of the eight bits because ASCII text was originally a seven-bit format, and email was only text in the beginning. Although most mail servers today are capable of supporting eight bits, older mail servers may not have been upgraded.

As a result, when binary files are attached to email messages, their 8-bit format is converted into a temporary 7-bit format. Encoding formats such as MIME, UUcoding and BinHex are used, and at the receiving end, they convert the 7-bit code back into 8-bit binary files. The 8-bit to 7-bit conversion makes attached files larger as they traverse the Internet. See binary, byte and ASCII.
References in periodicals archive ?
It is used for reading binary files, analyzing data, and using it with model objects to build a model.
Besides being able to understand binary files, 010 Editor also contains a full-featured hex editor with standard Cut, Copy, and Paste commands.
Hughes produced Binary File to cut down Bourgainville inside the last furlong and score by a cosy three-quarters of a length.
Otherwise, it would try the other binary file. After both binary files had been tried, it would send over rm commands for the object files to clear away all evidence of the attempt at infection.
Hughes produced 7-2 shot Binary File to cut down Bourgainville inside the last furlong and score by a cosy three-quarters of a length.
An archive is simply a compressed binary file containing several other files.
RICHARD HANNON'S Red Spell had to settle for second place, proving no match for the shock near-22-1 winner Binary File in the Listed Pramms Memorial on the dirt at Jagersro in Malmo on Friday evening.
BINARY FILE is the new 8-1 favourite (from 12-1) for the Cambridgeshire at Newmarket on October 5 after winning impressively at York yesterday.
This was done by logging in, running Kermit, setting the file type to receive a binary file, and then transferring the file using the Kermit protocol available on ProComm.
Binary File fared best of the Brits, seven and a half lengths away in fifth place, while Al Turf faded into second last, having been prominent until a furlong and a half out.
The Richard Hannon-trained runner will be joined from Britain by Binary File, runner-up in the Group 2 Prix Dollar on his last visit to France.
Binary File did not show his best until around this time last year, winning a Listed event at York before finishing second in a Group 2 at Longchamp.