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  2. File size - Wikipedia

    en.wikipedia.org/wiki/File_size

    Due to typical file system design, the amount of space allocated for a file is usually larger than the size of the file's data – resulting in a relatively small amount of storage space for each file, called slack space or internal fragmentation, that is not available for other files but is not used for data in the file to which it belongs.

  3. Megabyte - Wikipedia

    en.wikipedia.org/wiki/Megabyte

    The megabyte is a multiple of the unit byte for digital information. Its recommended unit symbol is MB. The unit prefix mega is a multiplier of 1 000 000 (10 6) in the International System of Units (SI). [1] Therefore, one megabyte is one million bytes of information. This definition has been incorporated into the International System of ...

  4. Data-rate units - Wikipedia

    en.wikipedia.org/wiki/Data-rate_units

    The ISQ symbols for the bit and byte are bit and B, respectively.In the context of data-rate units, one byte consists of 8 bits, and is synonymous with the unit octet.The abbreviation bps is often used to mean bit/s, so that when a 1 Mbps connection is advertised, it usually means that the maximum achievable bandwidth is 1 Mbit/s (one million bits per second), which is 0.125 MB/s (megabyte per ...

  5. Wikipedia:Database download - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Database_download

    The first field of this index is the number of bytes to seek into the compressed archive pages-articles-multistream.xml.bz2, the second is the article ID, the third the article title. Cut a small part out of the archive with dd using the byte offset as found in the index.

  6. List of floppy disk formats - Wikipedia

    en.wikipedia.org/wiki/List_of_floppy_disk_formats

    Download QR code; Print/export ... 2.5 Mb [16] [17] 8 inch Burroughs Double 2 139 150 7,100 2 [18] Logical formats ... Bytes/ sector Sectoring

  7. List of interface bit rates - Wikipedia

    en.wikipedia.org/wiki/List_of_interface_bit_rates

    3 MB/s: 1975 ISA 8-Bit/4.77 MHz: 0 W/S: every 4 clocks 8 bits 1 W/S: every 5 clocks 8 bits: 0 W/S: every 4 clocks 1 byte 1 W/S: every 5 clocks 1 byte: 1981 (created) STD-80 16-bit/8 MHz: 32 Mbit/s: 4 MB/s: I3C (HDR mode) [28] 33.3 Mbit/s: 4.16 MB/s: 2017 Zorro II 16-bit/7.14 MHz [29] 42.4 Mbit/s: 5.3 MB/s: 1986 ISA 16-Bit/8.33 MHz: 66.64 Mbit/s ...

  8. Orders of magnitude (data) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(data)

    8,192 bits (1,024 bytes) – RAM capacity of a ZX81 and a ZX80. 9,408 bits (1,176 bytes) – uncompressed single-channel frame length in standard MPEG audio (75 frames per second and per channel), with standard 16-bit sampling at 44,100 Hz 10 4: 15,360 bits – one screen of data displayed on an 8-bit monochrome text console (80x24) 2 14

  9. Data compression ratio - Wikipedia

    en.wikipedia.org/wiki/Data_compression_ratio

    Thus, a representation that compresses the storage size of a file from 10 MB to 2 MB yields a space saving of 1 - 2/10 = 0.8, often notated as a percentage, 80%. For signals of indefinite size, such as streaming audio and video, the compression ratio is defined in terms of uncompressed and compressed data rates instead of data sizes: