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  2. Base64 - Wikipedia

    en.wikipedia.org/wiki/Base64

    Base64 is also widely used for sending e-mail attachments, because SMTP – in its original form – was designed to transport 7-bit ASCII characters only. Encoding an attachment as Base64 before sending, and then decoding when received, assures older SMTP servers will not interfere with the attachment.

  3. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    Portable bitmap ASCII 50 34 0A: P4␊ 0 pbm Portable bitmap binary 50 32 0A: P2␊ 0 pgm Portable Gray Map ASCII 50 35 0A: P5␊ 0 pgm Portable Gray Map binary 50 33 0A: P3␊ 0 ppm Portable Pixmap ASCII 50 36 0A: P6␊ 0 ppm Portable Pixmap binary D7 CD C6 9A: ×ÍÆš: 0 wmf Windows Metafile: 67 69 6D 70 20 78 63 66: gimp xcf: 0 xcf XCF (file ...

  4. Binary-to-text encoding - Wikipedia

    en.wikipedia.org/wiki/Binary-to-text_encoding

    A binary-to-text encoding is encoding of data in plain text.More precisely, it is an encoding of binary data in a sequence of printable characters.These encodings are necessary for transmission of data when the communication channel does not allow binary data (such as email or NNTP) or is not 8-bit clean.

  5. data URI scheme - Wikipedia

    en.wikipedia.org/wiki/Data_URI_scheme

    Since Base64 encoded data is approximately 33% larger than original data, it is recommended to use Base64 data URIs only if the server supports HTTP compression or embedded files are smaller than 1KB. The data, separated from the preceding part by a comma (,). The data is a sequence of zero or more octets represented as characters. The comma is ...

  6. BMP file format - Wikipedia

    en.wikipedia.org/wiki/BMP_file_format

    The BMP file format, or bitmap, is a raster graphics image file format used to store bitmap digital images, independently of the display device (such as a graphics adapter), especially on Microsoft Windows [2] and OS/2 [3] operating systems.

  7. Bitmap index - Wikipedia

    en.wikipedia.org/wiki/Bitmap_index

    A bitmap index is a special kind of database index that uses bitmaps.. Bitmap indexes have traditionally been considered to work well for low-cardinality columns, which have a modest number of distinct values, either absolutely, or relative to the number of records that contain the data.

  8. Comparison of graphics file formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_graphics...

    Portable Bitmap File Format ASCII.pbm image/x-portable-bitmap Yes PCX: ZSoft PC Paintbrush File ZSoft Corporation.pcx, .pcc, .dcx image/x-pcx Dated rle packed indexed image format, used in some early 3d shooting games like Unreal Tournament as it takes up very little space and is easy to decode. ? PDF: Portable Document Format Adobe Systems.pdf ...

  9. Binary decoder - Wikipedia

    en.wikipedia.org/wiki/Binary_decoder

    In digital electronics, a binary decoder is a combinational logic circuit that converts binary information from the n coded inputs to a maximum of 2 n unique outputs. They are used in a wide variety of applications, including instruction decoding, data multiplexing and data demultiplexing, seven segment displays, and as address decoders for memory and port-mapped I/O.