The primary purpose of ISO 19005 is to define a file format based on PDF, known as PDF/A, which provides a mechanism for representing electronic documents in a manner that preserves their static visual appearance over time, independent of the tools and systems used for creating, storing or rendering the files.
A secondary purpose of ISO 19005 is to define a framework for representing the logical structure and other semantic information of electronic documents within conforming files.
Another purpose of ISO 19005 is to provide a framework for recording the context and history of electronic documents in metadata within conforming files.
These goals are accomplished by identifying the set of PDF components that can be used, and restrictions on the form of their use, within conforming PDF/A files.
An ISO 17025 Requirement Larry Jassin Eckert & Ziegler Isotope Products (EZIP) October 27, 2015. Beta Emitters Sr-89, Sr-90, Tc-99 Water, Soil, Filter 0.925 –3.7.Volumes: Liquids / Vegetation / Soils = up to 1 liter Environmental Monitoring. EZIP has regularly operating PT Programs EZIP participates in a Measurement Assurance Program. Macos catalina the power of mac 10 15. Based on PDF 1.7 (ISO 32000-1), PDF/A-2 extends the PDF/A concept to encompass the new features added to PDF between versions 1.4 and 1.7. PDF/A-2 requires that any attached file be either itself a PDF/A file or plain text. Purchase PDF/A-2 from ISO's website. ISO 19005-3 (PDF/A-3).
At present, there are three 'parts' to the PDF/A family of standards:
ISO 19005-1 (PDF/A-1)
Based on PDF 1.4, PDF/A-1 is the original PDF/A specification published in 2005.
Purchase PDF/A-1 from ISO's website. The corrigenda for PDF/A-1 may also be downloaded from the same page.
ISO 19005-2 (PDF/A-2)
Based on PDF 1.7 (ISO 32000-1), PDF/A-2 extends the PDF/A concept to encompass the new features added to PDF between versions 1.4 and 1.7. PDF/A-2 requires that any attached file be either itself a PDF/A file or plain text.
Purchase PDF/A-2 from ISO's website.
ISO 19005-3 (PDF/A-3)
PDF/A-3 is identical to PDF/A-2, but permits arbitrary attachments to PDF/A-3 files.
Purchase PDF/A-3 from ISO's website.
7-Zip is a file archiver with a high compression ratio.
Kypass companion 1 9. Download 7-Zip 19.00 (2019-02-21) for Windows:
Link | Type | Windows | Size |
---|---|---|---|
Download | .exe | 32-bit x86 | 1.2 MB |
Download | .exe | 64-bit x64 | 1.4 MB |
Download 7-Zip 20.02 alpha (2020-08-08) for Windows:
Link | Type | Windows | Size |
---|---|---|---|
Download | .exe | 32-bit x86 | 1.2 MB |
Download | .exe | 64-bit x64 | 1.4 MB |
Download | .exe | 64-bit ARM64 | 1.5 MB |
License
7-Zip is free software with open source. The most of the code is under the GNU LGPL license. Some parts of the code are under the BSD 3-clause License. Also there is unRAR license restriction for some parts of the code. Read 7-Zip License information.
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You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip.
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The main features of 7-Zip
- High compression ratio in 7z format with LZMA and LZMA2 compression
- Supported formats:
- Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM
- Unpacking only: AR, ARJ, CAB, CHM, CPIO, CramFS, DMG, EXT, FAT, GPT, HFS, IHEX, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, QCOW2, RAR, RPM, SquashFS, UDF, UEFI, VDI, VHD, VMDK, WIM, XAR and Z.
- For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip
- Strong AES-256 encryption in 7z and ZIP formats
- Self-extracting capability for 7z format
- Integration with Windows Shell
- Powerful File Manager
- Powerful command line version
- Plugin for FAR Manager
- Localizations for 87 languages
7-Zip works in Windows 10 / 8 / 7 / Vista / XP / 2019 / 2016 / 2012 / 2008 / 2003 / 2000.
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p7zip - the port of the command line version of 7-Zip to Linux/Posix.
On 7-Zip's SourceForge Page you can find a forum, bug reports, and feature request systems.
Compression ratio
We compared 7-Zip with WinRAR 5.20.
FILE SETS: Mozilla Firefox 34.0.5 for Windows and Google Earth 6.2.2.6613 for Windows.
Archiver | Mozilla Firefox | Google Earth | ||
---|---|---|---|---|
65 files 85 280 391 bytes | 483 files 110 700 519 bytes | |||
Compressed size | Ratio | Compressed size | Ratio | |
7-Zip 9.35 -mx | 39 357 375 | 100% | 15 964 369 | 100% |
WinRAR 5.20 -m5 -s -ma5 -md128m | 41 789 543 | 106% | 17 035 432 | 107% |
Compression ratio results are very dependent upon the data used for the tests. Usually, 7-Zip compresses to 7z format 30-70% better than to zip format. And 7-Zip compresses to zip format 2-10% better than most of other zip compatible programs.