If WinRAR ever went open source, I would love to see how it handles the CDs. Welcome to the wonderful world of the corporate change control process and VBS being acceptable but VB not being.) The CD was by far the biggest problem because it can be written in all manner of weird and wonderful ways. (Side note - I once made a ground-up VBS script to decompress a ZIP using nothing more than hex-string manipulation. WinRAR, however, is very good at working out a really broken "central directory" (the "hash-chain" or "master file table" of a ZIP file). Zip64 is ancient - everything knows about it (introduced in 2001, only WinXP can't handle it AFAIK) Archiving utilities such as WinRAR, WinZip or 7Zip are useful for compressing large files into smaller ones to send as email attachments to someone who can extract them using a similar tool, or. Windows XP is zip 2.1, Windows 7 is at least 6.3 (it will handle a BZIP2 format, which was introduced in 6.3). Zips also contain a "version to extract", which is the minimum version of the format which a decoder has to understand. I've seen zips using LZW, for example, by Linux newbies who fucked up their command line. The latter two were added in 2006, which post-dates the Windows "zipfolders" (essentially unchanged since Windows ME). To utilize it, first of all, download 7zip from the provided link and install it: After.
Per PKWARE's "standard", BZIP2, LZMA and PGMM+ are also acceptable. 7zip is utility software used to compress or extract archive files. Anyway, zips are NOT any form of standard! The basic PK file format is well understood, but it can use any compression algorithm! Usually it's your bog standard "DEFLATE" (Huffman tables + LZ77) algorithm but you can put anything in it.
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