Necessity
As mentioned earlier, some computer programs need no installation. This was once usual for many programs which run on DOS, Mac OS, Atari TOS and AmigaOS. As the computing environment grew more complex however, the need for tangible installation presented itself.
Nowadays, a class of modern applications that do not need installation are known as portable applications, as they may be roamed around onto different computers and run. Similarly, there are live operating systems, which do not need installation and can be run directly from a bootable CD, DVD, or USB flash drive. Examples are AmigaOS 4.0, various Linux distributions, MorphOS or Mac OS versions 1.0 through 9.0. (See live CD and live USB.) Finally, web applications, which run inside a web browser, do not need installation.
Read more about this topic: Installation (computer Programs)
Famous quotes containing the word necessity:
“The necessity of labor and conversation with many men and things to the scholar is rarely well remembered.”
—Henry David Thoreau (1817–1862)
“The secret of the illusoriness is in the necessity of a succession of moods or objects. Gladly we would anchor, but the anchorage is quicksand.”
—Ralph Waldo Emerson (1803–1882)
“There was a time when the average reader read a novel simply for the moral he could get out of it, and however naïve that may have been, it was a good deal less naïve than some of the limited objectives he has now. Today novels are considered to be entirely concerned with the social or economic or psychological forces that they will by necessity exhibit, or with those details of daily life that are for the good novelist only means to some deeper end.”
—Flannery O’Connor (1925–1964)