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On modern systems, all versions of Microsoft Windows including the newest (as of 2019) Windows 10 divide by 1024 and represent a 65,536-byte file as "64 KB". [9] Conversely, Mac OS X Snow Leopard and newer represent this as 66 kB, rounding to the nearest 1000 bytes. [15] File sizes are reported with decimal prefixes. [16]
Since two blocks comprised 1024 bytes, the capacity was quoted "360 KB", with the binary sense of "K". On the other hand, the quoted capacity of "1.44 MB" of the High Density ("HD") version was again a hybrid decimal and binary notation, since it meant 1440 pairs of 512-byte sectors, or 1440 × 2 10 = 1 474 560 bytes.
(kB, KB) 8,000 bits (1,000 bytes) 2 13: kibibyte (KiB) 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
For example, a kilobyte is actually 1024 bytes even though the standard meaning of kilo is 1000. And, mega normally means one million, but in computing is often used to mean 2 20 = 1 048 576 . The table below illustrates the differences between normal metric sizes and the implied actual size – the binary size.
An alternative system of nomenclature for the same units (referred to here as the customary convention), in which 1 kilobyte (KB) is equal to 1,024 bytes, [38] [39] [40] 1 megabyte (MB) is equal to 1024 2 bytes and 1 gigabyte (GB) is equal to 1024 3 bytes is mentioned by a 1990s JEDEC standard. Only the first three multiples (up to GB) are ...
The enhanced DOS command line processor 4DOS 3.00 supports a number of additional conditions (DISKFREE, DOSMEM/DOSFREE, EMS, EXTENDED, FILESIZE and XMS) in IF commands, which allow to test for sizes in bytes, kilobytes (by appending a K) or megabytes (by appending an M), where 1 K is defined as 1024 bytes and 1 M is defined as 1024 × 1024 ...
In modern textbooks one kilobyte is defined as 1,000 byte, one megabyte as 1,000,000 byte, etc., in accordance with the 1998 International Electrotechnical Commission (IEC) standard. However, the convention adopted by Windows systems is to define 1 kilobyte is as 1,024 (or 2 10) bytes, which is equal to 1 kibibyte.
Kilobyte (kB) is a decimalized unit measure of data storage, equalling 1000 bytes. Kilobyte may also refer to: Kibibyte (KiB) an idiomatic unit measure of data storage equalling 1024 bytes, also called a "kilobyte" (KB) Kilobyte (Ace Lightning), a fictional character, a cyberstalker from Ace Lightning, see List of Ace Lightning characters