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ESD Format
The Windows Imaging Format (WIM) is a file-based disk image format. It was developed by Microsoft to help deploy Windows Vista and subsequent versions of the Windows operating system family. Design Like other disk image formats, a WIM file contains a set of files and associated filesystem metadata. However, unlike sector-based formats (such as ISO or VHD), WIM is file-based: the fundamental unit of information in a WIM is a file. The primary advantages of being file-based is hardware independence and single-instance storage of a file referenced multiple times in the filesystem tree. Since the files are stored inside a single WIM file, the overhead of opening and closing many individual files is reduced. The cost of reading or writing many thousands of individual files on the local disk is negated by hardware and software-based disk caching as well as sequential reading and writing of the data. WIM files can contain multiple disk images, which are referenced either by their n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Disk Image
A disk image is a snapshot of a storage device's content typically stored in a file on another storage device. Traditionally, a disk image was relatively large because it was a bit-by-bit copy of every storage location of a device (i.e. every sector of a hard disk drive), but it is now common to only store allocated data to reduce storage space. Compression and deduplication are commonly used to further reduce the size of image files. Disk imaging is performed for a variety of purposes including digital forensics, cloud computing, system administration, backup, and emulation for digital preservation strategy. Despite the benefits, storage costs can be high, management can be difficult and imaging can be time consuming. Disk images can be made in a variety of formats depending on the purpose. Virtual disk images (such as VHD and VMDK) are intended to be used for cloud computing, ISO images are intended to emulate optical media, such as a CD-ROM. Raw disk images are use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boot Loader
A bootloader, also spelled as boot loader or called bootstrap loader, is a computer program that is responsible for booting a computer and booting an operating system. If it also provides an interactive menu with multiple boot choices then it's often called a boot manager. When a computer is turned off, its softwareincluding operating systems, application code, and dataremains stored on non-volatile memory. When the computer is powered on, it typically does not have an operating system or its loader in random-access memory (RAM). The computer first executes a relatively small program stored in the boot ROM, which is read-only memory (ROM, and later EEPROM, Flash memory#NOR flash, NOR flash) along with some needed data, to initialize hardware devices such as CPU, motherboard, memory, storage and other I/O devices, to access the nonvolatile device (usually Device file#Block devices, block device, e.g., NAND flash) or devices from which the operating system programs and data can be l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penton (company)
Penton was an information services and marketing company. The company's three largest revenue streams came from events, digital and marketing services. Although Penton had a long history (see below) as a trade publisher, in 2015 it reported that 35 percent of its EBITDA derived from digital products, 54 percent from events, and 11 percent from print. The main industry segments served by Penton include agriculture, transportation, natural products/food, infrastructure, and design and manufacturing. The company was descended from Penton Publishing, founded by John Penton in Cleveland in 1904 to bring together production of several trade magazine titles, including ''Foundry'', which he had created in Detroit in 1892. However, after the Penton/Prism merger, the company is now headquartered in New York City, although it continues to maintain offices in Cleveland and other U.S. cities, with an employee base of approximately 1,350 people. Due to reduced advertising sales as customers s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Microsoft Codenames
Microsoft codenames are given by Microsoft to products it has in development before these products are given the names by which they appear on store shelves. Many of these products (new versions of Windows in particular) are of major significance to the IT community, and so the terms are often widely used in discussions before the official release. Microsoft usually does not announce a final name until shortly before the product is publicly available. It is not uncommon for Microsoft to reuse codenames a few years after a previous usage has been abandoned. There has been some suggestion that Microsoft may move towards defining the real name of their upcoming products earlier in the product development lifecycle to avoid needing product codenames. Operating systems Windows 3.x and 9x Windows NT family Windows platform engineering milestones The following are code names used for internal development cycle iterations of the Windows core, although they are not necessarily the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windows Automated Installation Kit
Windows Assessment and Deployment Kit (Windows ADK), formerly Windows Automated Installation Kit (Windows AIK or WAIK), is a collection of tools and technologies produced by Microsoft designed to help deploy Microsoft Windows operating system images to target computers or to a virtual hard disk image in VHD format. It was first introduced with Windows Vista. WAIK is a required component of Microsoft Deployment Toolkit. History Windows AIK Version 1.0 was released with Windows Vista. New or redesigned tools and technologies included Windows System Image Manager (Windows SIM), Sysprep, ImageX, and Windows Preinstallation Environment (WinPE) v2.0. Windows AIK Version 1.1 was released with Windows Vista SP1 and Windows Server 2008. A number of new tools were introduced, including PostReflect and VSP1Cln. WinPE 2.1 could be more customized. Supported operating systems include Windows Server 2008, Windows Vista, Windows Server 2003 SP1, Windows Server 2003 SP2 and Windows XP ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SHA-1
In cryptography, SHA-1 (Secure Hash Algorithm 1) is a hash function which takes an input and produces a 160-bit (20-byte) hash value known as a message digest – typically rendered as 40 hexadecimal digits. It was designed by the United States National Security Agency, and is a U.S. Federal Information Processing Standard. The algorithm has been cryptographically broken but is still widely used. Since 2005, SHA-1 has not been considered secure against well-funded opponents; as of 2010 many organizations have recommended its replacement. NIST formally deprecated use of SHA-1 in 2011 and disallowed its use for digital signatures in 2013, and declared that it should be phased out by 2030. , chosen-prefix attacks against SHA-1 are practical. As such, it is recommended to remove SHA-1 from products as soon as possible and instead use SHA-2 or SHA-3. Replacing SHA-1 is urgent where it is used for digital signatures. All major web browser vendors ceased acceptance of SHA-1 SSL certifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DISM
Windows Assessment and Deployment Kit (Windows ADK), formerly Windows Automated Installation Kit (Windows AIK or WAIK), is a collection of tools and technologies produced by Microsoft designed to help deploy Microsoft Windows operating system images to target computers or to a virtual hard disk image in VHD format. It was first introduced with Windows Vista. WAIK is a required component of Microsoft Deployment Toolkit. History Windows AIK Version 1.0 was released with Windows Vista. New or redesigned tools and technologies included Windows System Image Manager (Windows SIM), Sysprep, ImageX, and Windows Preinstallation Environment (WinPE) v2.0. Windows AIK Version 1.1 was released with Windows Vista SP1 and Windows Server 2008. A number of new tools were introduced, including PostReflect and VSP1Cln. WinPE 2.1 could be more customized. Supported operating systems include Windows Server 2008, Windows Vista, Windows Server 2003 SP1, Windows Server 2003 SP2 and Windows XP SP2. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solid Compression
In computing, solid compression is a method for data compression of multiple files, wherein all the uncompressed files are concatenated and treated as a single data block. Such an archive is called a solid archive. It is used natively in the 7z and RAR formats, as well as indirectly in tar-based formats such as .tar. gz and .tar. bz2. By contrast, the ZIP format is not solid because it stores separately compressed files (though solid compression can be emulated for small archives by combining the files into an uncompressed archive file and then compressing that archive file inside a second compressed ZIP file). Explanation Compressed file formats often feature both compression (storing the data in a small space) and archiving (storing multiple files and metadata in a single file). One can combine these in two natural ways: * compress the individual files, and then archive into a single file; * archive into a single data block, and then compress. The order matters (these oper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Range Coding
Range coding (or range encoding) is an entropy coding method defined by G. Nigel N. Martin in a 1979 paper,G. Nigel N. Martin, ''Range encoding: An algorithm for removing redundancy from a digitized message'' Video & Data Recording Conference, Southampton, UK, July 24–27, 1979. which effectively rediscovered the FIFO arithmetic code first introduced by Richard Clark Pasco in 1976. Given a stream of symbols and their probabilities, a range coder produces a space-efficient stream of bits to represent these symbols and, given the stream and the probabilities, a range decoder reverses the process. Range coding is very similar to arithmetic coding, except that coding is done with digits in any bas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huffman Encoding
In computer science and information theory, a Huffman code is a particular type of optimal prefix code that is commonly used for lossless data compression. The process of finding or using such a code is Huffman coding, an algorithm developed by David A. Huffman while he was a Sc.D. student at MIT, and published in the 1952 paper "A Method for the Construction of Minimum-Redundancy Codes". The output from Huffman's algorithm can be viewed as a variable-length code table for encoding a source symbol (such as a character in a file). The algorithm derives this table from the estimated probability or frequency of occurrence (''weight'') for each possible value of the source symbol. As in other entropy encoding methods, more common symbols are generally represented using fewer bits than less common symbols. Huffman's method can be efficiently implemented, finding a code in time linear to the number of input weights if these weights are sorted. However, although optimal among met ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LZ77
LZ77 and LZ78 are the two lossless data compression algorithms published in papers by Abraham Lempel and Jacob Ziv in 1977 and 1978. They are also known as Lempel-Ziv 1 (LZ1) and Lempel-Ziv 2 (LZ2) respectively. These two algorithms form the basis for many variations including Lempel–Ziv–Welch, LZW, Lempel–Ziv–Storer–Szymanski, LZSS, Lempel–Ziv–Markov chain algorithm, LZMA and others. Besides their academic influence, these algorithms formed the basis of several ubiquitous compression schemes, including GIF and the DEFLATE algorithm used in Portable Network Graphics, PNG and Zip (file format), ZIP. They are both theoretically dictionary coders. LZ77 maintains a sliding window during compression. This was later shown to be equivalent to the ''explicit dictionary'' constructed by LZ78—however, they are only equivalent when the entire data is intended to be decompressed. Since LZ77 encodes and decodes from a sliding window over previously seen characters, decompressio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windows 10
Windows 10 is a major release of Microsoft's Windows NT operating system. The successor to Windows 8.1, it was Software release cycle#Release to manufacturing (RTM), released to manufacturing on July 15, 2015, and later to retail on July 29, 2015. Windows 10 was made available for download via MSDN and Microsoft Technet, TechNet, as a free upgrade for retail copies of Windows 8 and Windows 8.1 users via the Microsoft Store, and to Windows 7 users via Windows Update. Unlike previous Windows NT releases, Windows 10 receives new software build, builds on an ongoing basis, which are available at no additional cost to users; devices in enterprise environments can alternatively use long-term support milestones that only receive critical updates, such as security patch (computing), patches. It was succeeded by Windows 11, which was released on October 5, 2021. In contrast to the Tablet computer, tablet-oriented approach of Windows 8, Microsoft provided the desktop environment, de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
