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CRC's first product, 5-56, is still sold. However, 6-56, a silicone-based replacement, is CRC's current competing product for WD-40. Brakleen, a tetrachloroethylene (PERC)-based brake cleaner, is one of CRC's signature products. It has gained a cult following due to its dissolving power and has been used off-label for many other purposes, a ...
Cyclic redundancy check. A cyclic redundancy check ( CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to digital data. [1] [2] Blocks of data entering these systems get a short check value attached, based on the remainder of a polynomial division of their contents.
Jenkins hash function. 32 or 64 bits. XOR/addition. Bernstein 's hash djb2 [2] 32 or 64 bits. shift/add or mult/add. or shift/add/xor or mult/xor. PJW hash / Elf Hash. 32 or 64 bits.
In machining, numerical control, also called computer numerical control ( CNC ), [1] is the automated control of tools by means of a computer. It is used to operate tools such as drills, lathes, mills, grinders, routers and 3D printers. CNC transforms a piece of material ( metal, plastic, wood, ceramic, stone, or composite) into a specified ...
A CRC has properties that make it well suited for detecting burst errors. CRCs are particularly easy to implement in hardware and are therefore commonly used in computer networks and storage devices such as hard disk drives. The parity bit can be seen as a special-case 1-bit CRC.
Fletcher's checksum. The Fletcher checksum is an algorithm for computing a position-dependent checksum devised by John G. Fletcher (1934–2012) at Lawrence Livermore Labs in the late 1970s. [1] The objective of the Fletcher checksum was to provide error-detection properties approaching those of a cyclic redundancy check but with the lower ...
Computation of a cyclic redundancy check is derived from the mathematics of polynomial division, modulo two. In practice, it resembles long division of the binary message string, with a fixed number of zeroes appended, by the "generator polynomial" string except that exclusive or operations replace subtractions.
China Resources Holdings Co., Ltd华润. China Resources Holdings Company Limited ( Chinese: 华 润 ), or simply China Resources, is a Chinese state-owned conglomerate that owns a variety of businesses in Hong Kong and Mainland China. Some of its subsidiaries use the name in the form of the acronym CRC .