Search results
Results from the WOW.Com Content Network
8-inch floppy disk, inserted in drive, (3½-inch floppy diskette, in front, shown for scale) 3½-inch, high-density floppy diskettes with adhesive labels affixed The first commercial floppy disks, developed in the late 1960s, were 8 inches (203.2 mm) in diameter; [4] [5] they became commercially available in 1971 as a component of IBM products and both drives and disks were then sold ...
A Maxell-branded 3-inch Compact Floppy Disk. The floppy disk is a data storage and transfer medium that was ubiquitous from the mid-1970s well into the 2000s. [1] Besides the 3½-inch and 5¼-inch formats used in IBM PC compatible systems, or the 8-inch format that preceded them, many proprietary floppy disk formats were developed, either using a different disk design or special layout and ...
3 inch Double 2 80 9 512 720 kB 300 MFM 720 kB mode uses both sides - ensure disc inserted correct way up. Apple II: 5 1 ⁄ 4 inch Double 1 35 13 256 soft 113.75 kB 300 GCR [NB 2] 1 16 140 kB 3 1 ⁄ 2 inch Double 1 80 Variable (8-12) 512 400 kB 394 - 590 GCR [NB 3] 2 800 kB High 2 80 18 512 1,440 kB 300 MFM [NB 4] Apple Lisa: 5 1 ⁄ 4 inch ...
Figure 1. Disk structures: (A) Track (B) Geometrical sector (C) Track sector (D) Cluster A disk drive track is a circular path on the surface of a disk or diskette on which information is magnetically recorded and from which recorded information is read.
By 1988, the 3 + 1 ⁄ 2-inch was outselling the 5 + 1 ⁄ 4-inch. [69] In South Africa, the 3 + 1 ⁄ 2-inch format was generally called a stiffy disk, to distinguish it from the flexible 5 + 1 ⁄ 4-inch format. [70] [71] The term "3 + 1 ⁄ 2-inch" or "3.5-inch" disk is and was rounded from the 90 mm actual dimension of one side of the ...
In the above examples, the cardinality of the set A is 4, while the cardinality of set B and set C are both 3. An infinite set is a set with an infinite number of elements, while a finite set is a set with a finite number of elements.
Here, the numbers may come as close as they like to 12, including 11.999 and so forth (with any finite number of 9s), but 12.0 is not included. In some European countries, the notation [ 5 , 12 [ {\displaystyle [5,12[} is also used for this, and wherever comma is used as decimal separator , semicolon might be used as a separator to avoid ...
The set which contains the values produced is called the codomain, but the set of actual values attained by the operation is its codomain of definition, active codomain, image or range. [12] For example, in the real numbers, the squaring operation only produces non-negative numbers; the codomain is the set of real numbers, but the range is the ...