I guess technology world is just getting so complicated. you should learn many things about files and all extension type. Some of the file type you even don't know even you are using it for a long time. While we work in computer, computer itself recognize the correct file type for the program you are working for.

for example when you working for drawing files in XML Based format it's also using File Extension CDD, but we hardly notice that we are also using .cdd file extension. It's happen to me a lot that i know about new file type when we get some error notice in Internet explorer.

File Extension CDD is a common file type which is run by help of CADAM software. CADAM software was build for the Unix environment then later used in Windows Internet explorer too. Some time Internet explorer could not recognize File Extension CDD. That's why while designers working on some design often it's show some error message.

There is another editing tool called Cadifra,(a UML Editing tool for Windows) also use the .cdd file extension. Cadifra uses File Extension CDD for its drawing files as a XML based format which help the publishers freely offer the schema for download.

As this post is just to talking about the many different file extension that we are using in our daily life while we working on computer. Do you know Some file extension like .cdd, that there are seven reported associations for the file extension .cdd some are verified, some are not. So i guess this is just beginning , Human Mind is Just great. Hope you curious to know more about File Extension CDD,
Hope you enjoy reading this post i will write again when there is some thing in my mind.... :-)

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Have you ever send Email with attach large files. There is a big problem while you attach some Large file in your email. We can reduce File size by compress or archive to the selected file. If you are going to send some Large file you must compress or archive the files first. There are several method for compress or archive the file such as .zip, .gzip, or .rar and File Extension 7z.

We are familiar with .Zip , .gzip or .rar but 7-zip is new file extension for compress or archive the file, it's work same as normal extension. The .7z format more advance then Other method for compress, because .7z files are archives they are not likely to cause errors on their own. When we compress file using .7z extension, it's has ability for any compression, conversion, or encryption to be stacked, due to the file structure's container system. This stacking allows for a greater compression rate with a reduced risk of data loss. Some of the other advantages are the high compression rate itself, the ability to add security, the open architecture of the format, and the architecture allowing for additional compression methods to be added later.

File Extension 7z format is developed by Igor Pavlov for his 7-zip archiving tool, uses LZMA (Lempel-Ziv-Markov chain-Algorithm) compression by default, but also supports BCJ, BCJ2, BZip2, Deflate, and PPMD compression. There are many programs that support both compression and decompression of .7z files. If you are interested File Extension 7z download this program (original 7-Zip), for which the format was created, is offered as a free open source package under the GNU LGPL license. 7-zip has different versions for each operating system such as Mac, Linux, Windows, and WinCE. While you open .7z files, You may found File association errors, because of compatible archiving package is not installed on your computer. File association errors will solve after installing an appropriate File Extension 7z software package in your system.

So this is about .7z file type, try File Extension 7z, next time when you attach some files in to your email.
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