i just wana learn there technic of that kind of compressiom files are in rar comressed form
129380
There are limitations to how much you can compress a file.  Text and certain audio files (WAV) allow for a lot of compression.  Other file formats such as MP3 and Jpeg can't be compressed very much because they are already compressed.  This is the only secret to great compression rates (very compressible source files).  The archiver program you choose does matter, but not as much as the file type.\n\nTo make rar archives, you should use a program like WinRar.  It allows you to break up the archive into even-sized chunks or to create a self-extracting archive.  It provides pretty good compression.
105459
Your windows will occasionally compress files in your computer, files that had been compressed will show blu color fonts, the ones in black are still hvnt been compressed yet. Don't worry it won't do any harm.
462088
You said this was an easy question,\nLIAR, lol:)\n\nMy computer mispalces files too, the best advise is poke around till you find it.\n\nI hope someone who is more computer literate helps you. Sorry, technology doesn't like me.
337845
.rar are files compressed into a single file - you need to "unpack" these files with WinRar - http://www.rarlab.com/
184599
Use PowerArchiver. It can decompress all kinds of compressed files. Zip, 7z, RAR, Ace, CAB, etc,etc. It can extract the contents from an .ISO file too(the new version).Just download the latest PowerArchiver 2006 from download.com and if you can afford it, buy it, if you can't, download the crack from http://www.crackserver.com .
467549
You could recompress it with a different codec and/or data rate.  VirtualDub is good , free, and easy to use.\n\nhttp://www.virtualdub.org/
218115
No such utility exists.\nAll compression must be done server side.
348203
n computing, RAR is a proprietary file format for data compression and archiving.\n\nThe RAR file format was developed by Eugene Roshal (hence the name RAR: Roshal ARchive), who was born on March 10, 1972 in Russia and graduated from Chelyabinsk Technical University. He also developed programs for packing and unpacking RAR files, originally for DOS, and later ported to other platforms. The encoder (the main Windows version known as WinRAR) is distributed as shareware, but Roshal has released the decoder's source code under a license that allows free distribution and modification, on condition that it is not used to build a compatible encoder. The current developer is Alexander Roshal. The encoding method is held to be proprietary, but compatible programs for decompression are available for several platforms, such as the open-source 7-Zip. Despite widespread confusion there does not seem to be any open source implementation to decompress newer than version 2.0 RAR archives (7-zip uses a proprietary plugin under "unRAR license" for decompression).\n\nThe files extension is .rar. The MIME-Type is application/x-rar-compressed.\n\nAs computing power has increased, users have responded by preferring compression algorithms which achieve a better rate of compression at the expense of computational time when compressing and decompressing. RAR compression operations are typically much slower than compressing the same data with early compression algorithms like ZIP and gzip, but a much better rate of compression is achieved whenever the data can still be compressed further. As with any compression algorithm, there remains a possibility that the output will still be larger than the input, especially on data which has already been compressed. Bzip2, which came after ZIP and gzip, compresses more efficiently at a cost of computational time compared to them, but is in turn less efficient and computationally cheaper than RAR. 7z's LZMA algorithm is quite similar to RAR in providing extremely high compression efficiency at the cost of compute time to compress and decompress. Both provide among the highest compression efficiency of any popular scheme, with the question of which algorithm is the more efficient compression scheme strongly depending on the files being compressed. Both WinRAR and 7-Zip are still being actively developed.\n\nApart from the excellent rate of compression, RAR has several other features not previously found in many other archive formats, which has contributed greatly to its popularity:\n\n    * Its handling of split volumes is very good. The most notable such format, before the advent of RAR, was ARJ. It is unnecessary to use split volumes for this purpose alone since just binary splitting the files will work fine, and they can be reassembled with cat or binary copy. Multi-volume files have wide use though, mainly because they're generally easier to handle, especially when the file is spanning multiple disks. Built-in support for multi-volume files enable the unpacking program to simply prompt the user for the next disk, without any hassle of manually copying and then rejoining the pieces, or for extracting a file from a single piece without needing all pieces.\n    * RAR archives can be of a solid format, in which all of the compressed files are treated as a single data block. Most currently used compression formats (with the exception of the older ZIP) allow solid structuring.\n    * It features strong encryption capabilities. Older versions of the file format used a proprietary algorithm; newer versions use the AES encryption algorithm, which is considered very strong by today's standards. The only known ways to recover an encrypted file are via dictionary or brute force attacks, which are usually infeasible with non-dictionary passphrases starting from 8 characters.\n    * Variable amounts of redundancy (“recovery record”) can be added to an archive, making it more resistant to corrupt
244942
=========\ncorruption \n\nIn general, a corrupted compressed file is lost. Compression works by removing redundancy which might have been used to recover most or all of a plain text file that is equally corrupted. Without the extra information, reconstruction is typically not possible.\n\n=========\nmultipart\n\nSome compression programs allow you to specify that the compressed file be no larger than <some size>, so for instance it can fit on a floppy. If the data, compressed, is larger, such compression programs will produce a 2 part or 3 part or 4 part compressed file. All the parts must be produced when decompressing or the file will be treated as corrupted. You'll have to find the missing parts if it's a multipart kind of file. \n\nIt sounds like this may have happened to you. \n\n=========\navoidance\n\nBecause files stored in compressed form are more subject to total loss than the originals, something of which may be partially recoverable, the ideal backup and compression strategy should probably be to compress each file independently of all others. And perhsp back them up separately as well, instead of as a concatenated superfile.\n\nAnd, of course, you should do what many people never do. Test your backup software to make sure it works, on single files, on directories, etc. Make sure it preserves file and directory ownership, permissions, filenames, ... If it works on 10 smapel files of various sizes in two or threee directories, than you can have some faith it will work on real live precious, perhaps irreplacable, data.\n\nAnd the same is true of a compression program. It too should \nsquash and recover files without any change whatsoever. \n\nYou might try the *nixen utility diff to check whether the original and recovered files are identical. It's much more efficient, less error prone, and far less tiring than doing it manually. If you're running Linux (or one of hte BSD vairants, including Mac OS X) you should already have it. If you're running Windows, you can install the Cygwin package (from Red Hat) or the Uwin package (from Bell Labs) to get that and many other *nix type utilities. Both are freely avaialble for download. Try Google for mirror sites.
474376
There is a program called "Winrar" that will open both .rar and .zip files. These two types of files are similar. They are compressible. You can download winrar from www.rarlab.com/download.htm I am not too sure but I think it might be a trial version that you can use for 40 days but even though it is a "trial" you still have acess to all features and even after the "trial period" is over, you can still use it, you just have to deal with a little pop up whenever you open it. When the pop up opens, just click the "x" in the corner and use winrar like nothing happened.
242969
zip the file, E-mail me on gangsta_ggg_unit@yahoo.co.uk if you don't know how to zip the file
175816
don't understand your question... wht software ur using to encrypt files ... winzip, winrar or any other...give additional details!
203828
hey ,\n You need a software to unzip that file . go for winrar \ndownload it and unzip the file ..\n\ndownload from :\n http://www.rarlab.com/rar/wrar36b1.exe\n\n\nHope this Help u \n\n\nBye !!!
117827
it means that those folders and files had been compress by your operating system (windows 2000..windows xp) to save some disk space. this is usually done with old files and folder that you had not access/use for a long period of time.
200328
Try "MacZip".  It's a free compression software program for Macs, available for download at the below URL.
235481
As a serious tip, if you need more disk space, delete things, or buy a new hard drive.  The 'compress old files' is a terribly implemented feature in Windows XP.  I recommend not using it.
292639
download winrar from:\nhttp://www.rarlab.com\nwinrar is winner best file archiving program.\n\nnote: winzip is always problems.