A download manager is Download Free Computer Books a computer program dedicated to the task of downloading (and sometime uploading) possibly unrelated stand-alone Download Free Computer Books files from (and sometime to) the Internet for storage. This is unlike a World Wide Web browser, which is mainly intended to browse web pages, composed Download Free Computer Books of a multitude of smaller files, where error-free moving of Download Free Computer Books files for permanent storage is of secondary importance. (A failed or Download Free Computer Books incomplete web page file rarely ruins the page.) The typical download manager at Download Free Computer Books a minimum provides means to recover from errors without losing the Download Free Computer Books work already Download Free Computer Books completed, and can optionally split the file to be downloaded (or uploaded) Cnbc Mad Money Download into 2 or more segments, which are then Download Free Computer Books moved in parallel, potentially Download Free Computer Books making the process Download Free Computer Books faster within the limits of the available bandwidth. (A few servers are known to block moving files in Download Free Computer Books parallel Download Free Computer Books segments, on the principle that server capacity should be Download Discount Oem Software shared Download Free Computer Books equally by all users.) Multi-source is the name given to files Download Free Computer Books that are downloaded in parallel.
There Download Free Computer Books are several things that some web browsers are Download Free Computer Books not very good at. That's Download Free Computer Books where the download managers enter the equation:
Pausing the downloading of large files.
Resuming broken or paused downloads (especially for very large files).
Downloading files on poor Download Free Computer Books connections.
Downloading several files Download Free Computer Books from a site automatically according to Download Free Computer Books simple rules (file Download Free Computer Books types, updated files, etc. - see also Offline Browser).
Automatic recursive downloads Download Free Computer Books (mirroring).
Scheduled downloads (including, automatic hang-up and shutdown).
Searching for mirror sites, and the handling Download Free Computer Books of different connections to download Download Free Computer Books the same file more quickly (segmented downloading).
Download managers are useful for active Internet users. For dial-up users, they can automatically dial the internet service provider at night, when rates Download Free Computer Books or tariffs are usually lower, download the specified files, and hang-up. They can record which links the user clicks on during the day, and queue these files for later download. For broadband users, download managers Download Free Computer Books can help download very Download Free Computer Books large files by resuming broken downloads, by limiting the Download Free Computer Books bandwidth Download Free Computer Books used, so that other Download Free Computer Books internet Download Free Computer Books activities are not affected (slowed) and the server is not overloaded, or by automatically navigating a site and downloading pre-specified content (photo galleries, MP3 collections, etc.) this can also include automatically downloading whole sites and Download Free Computer Books regularly updating them (see Mirroring).
Many download managers support Metalink, an XML file listing mirrors, checksums, and other information useful Download Free Computer Books for downloading.
See below for some Download Free Computer Books examples of commonly used download managers. Some downloaders are optimized for a certain Download Free Computer Books function. For example, Offline Explorer is designed to download entire websites.
Download managers, such as Go!Zilla, Download Free Computer Books were among the Download Free Computer Books first adware applications displaying a banner ad in the user interface.
Related to download managers are two other breeds of Internet programs, file-sharing peer-to-peer applications (Kazaa, eMule, BitTorrent, Gnutella) and stream recorders (such as StreamBox VCR).
While download managers are designed to give Download Free Computer Books users greater control over downloads, some downloaders are created to give that Download Free Computer Books control Download Free Computer Books to content distributors instead. Some Download Saafir The Hitlist software companies, for example Adobe [1], provide such downloaders for Download Free Computer Books downloading software on Download Free Computer Books their own site. Presumably this increases reliability and reduces tech Download Free Computer Books support costs to Download Free Computer Books them. A Download Free Computer Books possible reason is increasing the control over redistribution of their software (even when the software is freeware).In computer technology and telecommunication, on-line and off-line are defined by Federal Standard 1037C. They are states or conditions of a "device or equipment" or Download Free Computer Books of "a functional unit". To be considered on-line, a device must be at least one of:
"Under the direct control of another device"
"Under the direct control of the system with which it Download Free Computer Books is associated"
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"Available for immediate use on demand by the system without human intervention"
"Connected to a system, and is in operation"
"Functional and ready for service"
while a device that is off-line is not (e.g. it has "its main power source disconnected or turned off", and is "off-power").
One example of a common use of these concepts is Download Free Computer Books a Mail User Agent Free Download Phone that Download Free Computer Books can be instructed to be in either "on-line" or "off-line" states. One such MUA is Microsoft Outlook. When it Download Free Computer Books is Download Free Computer Books "on-line" it will attempt to connect to mail servers (to check for new mail at regular intervals, for example), and when it is "off-line" it will not attempt to make any such connections. The Download Free Computer Books "on-line" or "off-line" state of the MUA does not necessarily reflect the connection status Download Free Computer Books between the computer on which it is Download Free Computer Books running and Download Free Computer Books Internet. The user may have the computer itself on-line, connected to Internet Download Free Computer Books via a cable modem or an ADSL connection, but may wish for Outlook to Cheat Counter Download Source Strike be off-line, Download Free Computer Books so that it Download Free Computer Books makes no attempt to send or to receive Bzip2 Decompressor Download messages. Or the computer may be configured to employ a dial-up connection on demand (whenever an Dvd X Download Free application such as Download Free Computer Books Outlook attempts to make connection to a server), but the Download Free Computer Books connection may be an expensive telephone call from the particular location in which the Download Free Computer Books computer currently happens to be Download Free Computer Books (such Download Free Computer Books as Download Free Computer Books a hotel room) and the user may not wish Outlook to trigger making that call every 5 Download Free Computer Books or 10 minutes to check for mail.[1]
Another example of the use of these concepts is Download Free Computer Books in the world of digital audio technology. A tape recorder, digital editor, or other device that is "on-line" is Download Free Computer Books one whose clock is Download Free Computer Books under the control of the clock of a "synchronization master" device. When the sync master commences playback, the Download Free Computer Books "on-line" device automatically synchronizes itself to the master and Download Free Computer Books commences playing Download Free Computer Books from the same point in the Download Free Computer Books recording. Whereas a device that is Download Free Computer Books "off-line" uses no Download Free Computer Books external clock reference and relies upon its own internal clock. When a large number of devices are connected to a sync master, Download Free Computer Books it is often convenient, if one wants to hear just the output of one single device, to Staroffice Download take it off-line, because if the device Download Free Computer Books is played back on-line all synchronized devices have to locate Download Free Computer Books the playback point and Download Free Computer Books wait for each other to be in synchronization.[2] (For further related Download Free Computer Books discussion, see Internet Download Accelerator Key Gen MIDI timecode, word sync, Download Free Computer Books and recording system synchronization.)
A third example of a Download Free Computer Books common use of these concepts is a Download Free Computer Books web browser that can be instructed Download Free Computer Books to be in either Download Free Computer Books "on-line" or "off-line" Download Free Computer Books states. The browser Download Free Computer Books only attempts to fetch pages from servers Download Free Computer Books whilst in Download Free Computer Books the "on-line" state. In the "off-line" state, users can perform offline browsing, where pages can be browsed Download Free Computer Books Naruto Shippuden Music Download using local copies of those pages that have previously been downloaded whilst Download Free Computer Books in the "on-line" state. This can be useful when the computer itself is also off-line, with connection Download Free Computer Books to Internet expensive or Download Free Computer Books impossible. The pages are Download Free Computer Books either downloaded implicitly Download Free Computer Books into the web browser's own cache, as a result of prior on-line browsing by the user, or explicitly by the browser being configured to keep local copies of certain web pages, Download Free Computer Books which it keeps updated when the browser Download Free Computer Books is in the on-line state, either by checking that the local Download Free Computer Books copies are up-to-date at Download Tabledancers Best Time regular intervals or by checking that the local copies are up-to-date whenever the browser is switched to Download Free Computer Books the on-line state. One such web browser capable of being explicitly configured Download Free Computer Books to Download Free Computer Books download pages for offline browsing is Internet Download Free Computer Books Explorer. When pages are added to the "Favourites" list, they can be marked for Download Free Computer Books being made "available for offline browsing". Internet Download Free Computer Books Explorer will Download Free Computer Books download Download Free Computer Books to local copies both the marked page and, optionally, all of the pages that it links to. In Internet Explorer version 6, the level of direct and indirect links, the maximum amount of local disc Download Free Computer Books space allowed to be consumed, and the schedule on which local Download Free Computer Books copies are checked to see Download Free Computer Books whether they are up-to-date, are configurable for each individual "Favourite" entry.
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See also:
Offline browsing known as "Offline favourites" was removed as a feature in the most recent version of Internet Explorer 7, which only now supports single web Download Free Computer Books page saving, but not Download Free Computer Books browsing or storing an Download Free Computer Books entire site offline.[citation needed]
Similarly, off-line storage is computer storage that is not "available for immediate use on demand by Download Free Computer Books the system without human intervention", i.e it Download Free Computer Books is Download Free Computer Books storage that is off-line.
The ideas of "on-line" and "off-line" have been Download Free Computer Books generalized from computing and telecommunication into Download Free Computer Books the field of human interpersonal relationships. The distinction between what is considered "on-line" Download Free Computer Books and what is considered "off-line" has become a subject of study in the field of sociology.[7]
The distinction between "on-line" and "off-line" is conventionally seen Download Free Computer Books as the distinction between computer-mediated communication and face-to-face communication (e.g. face time), respectively. "On-line" is virtuality, and "off-line" is reality (e.g. real life or meatspace). Slater states that Download Free Computer Books this distinction is "obviously Download Free Computer Books far too simple". To support his Download Free Computer Books argument that the distinctions in relationships are more complex than a simple "on-line"/"off-line" dichotomy, he observes that some people draw no distinction between an "on-line" relationship, such as indulging in cybersex, and an "off-line" relationship, such as Download Free Computer Books being pen-pals. He also argues that even the telephone Download Free Computer Books can be regarded as Download Free Computer Books an "on-line" experience in some circumstances, and that the blurring of the distinctions between the uses of various Download Counter Strike Source Maps technologies (such as PDA and mobile telephone, television and Internet, and telephone and voice-over-IP) Download Free Computer Books has made it "impossible to use the term 'on-line' meaningfully in the sense that was employed by the first generation of Internet research".[7]
Slater asserts that there are legal and regulatory pressures to reduce the distinction between "on-line" and "off-line", with a "general tendency to Download Free Computer Books assimilate online to offline and erase the distinction", stressing, Download Free Computer Books however, that this does not mean that on-line relationships are being reduced Download Free Computer Books to pre-existing off-line relationships. He conjectures that greater Download Free Computer Books legal status may be assigned to on-line relationships (pointing out that contractual Download Free Computer Books relationships, such as Download Free Computer Books business transactions, on-line are already seen as just as "real" as their off-line counterparts), although he states it to be hard to imagine courts awarding palimony to people Download Free Computer Books who have had Download Free Computer Books a purely on-line sexual relationship. He also conjectures that an "on-line"/"off-line" distinction may be seen by people as "rather quaint and not quite comprehensible" within 10 years.[7]
The distinction where "on-line" is seen as virtuality and "off-line" as reality is sometimes inverted, with "on-line" concepts being used to Download Free Computer Books define and to explain "off-line" activities, Download Free Computer Books rather Download Free Computer Books than Download Dragon Speak Trial (as per the conventions of the desktop metaphor with its desktops, trash cans, folders, and so forth) the other Download Free Computer Books way around. Several cartoons by The New Yorker have satirized this. One includes Saint Peter asking for a user name and a Download Free Computer Books password before admitting a man into Heaven. Another illustrates "the off-line store" where "All items are actual size!", where shoppers Download Free Computer Books may "Take it home as soon as you pay for it!", and where "Merchandise may be handled prior to purchase!". |
