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Apple Disk Image file 78 61 72 21: xar! 0 xar eXtensible ARchive format [51] 50 4D 4F 43 43 4D 4F 43: PMOCCMOC: 0 dat Windows Files And Settings Transfer Repository [52] See also USMT 3.0 (Win XP) [53] and USMT 4.0 (Win 7) [54] User Guides 4E 45 53 1A: NES␚ 0 nes Nintendo Entertainment System ROM file [55] 75 73 74 61 72 00 30 30 75 73 74 61 ...
Base64 is particularly prevalent on the World Wide Web [1] where one of its uses is the ability to embed image files or other binary assets inside textual assets such as HTML and CSS files. [2] Base64 is also widely used for sending e-mail attachments, because SMTP – in its original form – was designed to transport 7-bit ASCII characters ...
A spy pixel is an image file that is deliberately made small, often of a single pixel and of a colour that makes it "impossible to spot with the naked eye even if you know where to look." [ 1 ] Any email user can be reached via email tracking due to the open nature of email.
If the data is Base64-encoded, then the data part may contain only valid Base64 characters. [7] Note that Base64-encoded data: URIs use the standard Base64 character set (with '+' and '/' as characters 62 and 63) rather than the so-called "URL-safe Base64" character set. Examples of data URIs showing most of the features are:
Be aware, if the picture was sent in an unsupported file format, such as TIFF, you may not be able to view it. Ask the sender to resend the picture using JPG or GIF file format. Check the attachments. The image sent may have been sent as an attachment rather than an embedded image.
Originally, ARPANET, UUCP, and Internet SMTP email allowed 7-bit ASCII text only. Text files were emailed by including them in the message body. In the mid 1980s text files could be grouped with UNIX tools such as bundle [1] [2] and shar (shell archive) [3] and included in email message bodies, allowing them to be unpacked on remote UNIX systems with a single shell command.
If you've just passed an image challenge, but are immediately prompted by another, there may be an issue with your browser. Before you attempt another image challenge, clear the cache on your web browser. If you're still prompted to retake the image challenge multiple times a day, you might have a more serious issue.
A uuencoded file starts with a header line of the form: begin <mode> <file><newline> <mode> is the file's Unix file permissions as three octal digits (e.g. 644, 744). This is typically only significant to Unix-like operating systems. <file> is the file name to be used when recreating the binary data.