# numerics

abbreviation / acronyms	term	definition
oD / 0-day	zero day zero Dimension	a software vulnerability that has been exploited by malicious hackers on or before the day the software creators become aware of the problem zero Dimension
0KB.IN	Free Knowledge Base of Internet	Free Knowledge Base of Internet
1080i	1080 interlaced	A HDTV video mode. 1080i implies 16:9 aspect ratio, horizontal resolution of 1920 pixels, and a frame resolution of 1920 × 1080 or about 2.07 million pixels.
1080p	1080 progressive	1080p implies progressive scan or non-interlaced which increases vertical line resolution ~1.6x times, 16:9 aspect ratio, horizontal resolution of 1920 pixels, and a frame resolution of 1920 × 1080 or about 2.07 million pixels.
10Base5	10 Mbps, baseband, 500 meter	one of several physical media specified by 802.3 for use in an Ethernet local area network LAN); consists of Thickwire coaxial cable with a maximum segment length of 500 meters
10BaseT	10 Mbps, baseband, unshielded twisted-pair	one of several physical media specified by IEEE 802.3 for use in an Ethernet local area network (LAN); is ordinary telephone twisted pair wire
100BaseT	100 Mbps, baseband, unshielded twisted-pair	one of several physical media specified by IEEE 802.3 for use in an Ethernet local area network (LAN); referred to as Fast Ethernet because of its higher transmission speed
10GFC	10 Gigabit Fibre Channel	A point-to-point serial bi-directional interface operating up to 10.2Gbps. 10GFC is an extension of the physical layer of Fibre Channel.
100VG	100 Voice Grade	100 Voice Grade
1FB	Single line, Flat Business rate;	Single line, Flat Business rate
1G	First generation	First generation mobile network. Refers to the initial category of mobile wireless networks that use analog technology only. Advanced Mobile Phone Service (AMPS) is an example of a 1G mobile network standard.
1RU	1 Rack Unit	1 Rack Unit
2.5G	Second and a half generation	2.5G is a sometimes used term that refers to GPRS class wireless data connectivity. It is not a formal standard.
23B +D		An abbreviation for the Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI), composed of 23 bearer (B) channels and one data (D) channel.
24x7 or 24/7	Twenty-four hours a day, seven days a week	A term commonly used to describe the concept of Internet time and how it has affected services.
24p	24 frames per second Progressive	Refers to the frame rate of movie film. Some video cameras are able to capture images at 24 fps as well as the common 30 fps, or more precisely 29.97 fps. HDTV sets also support 24p
2B1Q	Two Binary, One Quaternary	A line code used for BRI and Centrex BRI where each two bits of the binary data stream are combined into a single four-level pulse amplitude modulation signal.
2G	second generation	second generation mobile network. Refers generically to a category of mobile wireless networks and services that implement digital technology. GSM is an example of a 2G mobile network standard.
2G+	second generation plus	Refers generically to a category of mobile wireless networks that support higher data rates than 2G mobile networks. GPRS is an example of a 2G+ mobile network standard.
2PC	two-phase commit	A method for coordinating a single transaction across two or more DBMS or other resource managers. 2PC guarantees the logical integrity of data by ensuring that transaction updates are either finalized in all participating databases or fully backed out of all of them (that is, the update occurs "everywhere or nowhere").
2PKDP	Two-Party Key Distribution Protocol	A security protocol that combines bidirectional authentication with key distribution using a minimal number of messages.
3D	three-dimensional	3D computer graphics are graphic arts that were created with the aid of digital computers and specialized 3D software. In general, the term may also refer to the process of creating such graphics, or the field of study of 3D computer graphic techniques and its related technology.
3DES	Triple DES	Enhancement to DES encryption where the data is encrypted through three parses through the DES algorithm. It uses a 168bit key.
3ds	3D Studio	3ds Max is a 3D modeling, animation and rendering program from the Media and Entertainment division of Autodesk, Inc., San Rafael, CA (www.discreet.com)
3G	third generation	The term used to refer to the next generation of wireless communications technology, the "first generation" having been analog cellular, and the "second generation" being today's digital cellular networks.
3GIO	3rd Generation Input Output	Intel hardware spec
3GPP	3rd Generation Partnership Project	A collaboration agreement, established in 1998 among several telecommunications standards bodies, to produce a series of technical specifications and standards for third-generation (3G) wireless communications. http://www.3gpp.org/
3GL	third-generation language	A high-level programming language - such as FORTRAN, COBOL, BASIC or C - that compiles to machine language.
3i	Investors In Industry	Investors In Industry (venture capitalists)
3M	(formerly) Minnesota Mining and Manufacturing Company	a US multinational conglomerate corporation http://www.3m.com/
3P	Predictive, Proactive, and Preventive Philosophy	A maintenance practice that focuses on determining and performing corrective measures during normal operations over reactive measures that may impact users.
3W	World Wide Web	A hypermedia-based system for browsing Internet sites. It is named the Web because it is made of many sites linked together; users can travel from one site to another by clicking on hyperlinks.
4B5B	4 Byte 5 Byte	a form of data communications line code. 4B5B maps groups of four bits onto groups of five (5) bits, with a minimum density of 1 bits in the output. When NRZI-encoded, the 1 bits provide necessary clock transitions for the receiver.
4C Entity	Four Company Entity	industry organization leading the development, adoption and promotion of interoperable technology solutions for the authorized sharing of premium content. The consortium consists of IBM, Intel, Matsushita and Toshiba and has a goal of creating a common platform for DRM technologies.
4G	4th Generation	he next complete evolution in wireless communications that will a comprehensive solution allowing voice, data, and streamed multimedia to be provided on an “Anytime, Anywhere” basis at higher data rates than previous generations.
4GL	fourth-generation language	A high-level language suitable for end-user or programmer data access and capable of reasonably complex data manipulation. A common example is Microsoft's Visual Basic. 4GLs includes two categories of software development tools: application generators for production applications, and information generators for decision support applications.
4GT	4 Gigabyte memory Tuning	4 Gigabyte memory Tuning
5ESS	class five (5) electronic switching system	The 5ESS Switch is the digital central office circuit switching system sold by Lucent Technologies.
5GL	5th Generation Language	Artificial intelligence language based around solving problems using constraints given to the program, rather than using an algorithm written by a programmer
6DOF	Six Degrees of Freedom	A virtual reality term used to describe movement in three-dimensional space.
80/20	Eighty-twenty rule	The program-design version of the law of diminishing returns. The 80/20 rule says that roughly 80% of the problem can be solved with 20% of the effort that it would take to solve the whole problem.
8-n-1	8 bits, No parity, 1 stop bit	Common parameters for modem transmission.
8B10B	8 Byte 10 Byte	a line code that maps 8-bit symbols to 10-bit symbols to achieve DC-balance (see DC coefficient) and bounded disparity, and yet provide enough state changes to allow reasonable clock recovery.
90-90	Ninety-Ninety Rule	The first 90% of the code accounts for the first 90% of the development time. The remaining 10% of the code accounts for the other 90% of the development time.
9ifs	Oracle9i Internet File System	A file sharing system from Oracle that is based on the Oracle DBMS. It is designed to consolidate all the file servers in the enterprise and allows files to be accessed from a Web browser or Network Neighborhood.
9P	Plan 9 Filesystem Protocol	a network protocol developed for the Plan 9 from Bell Labs distributed operating system as the means of connecting the components of a Plan 9 system.
	10/100	a network adapter capable of operating at 10 or 100 megabits per second
	10/100/1000	a network adapter capable of operating at 10, 100, and 1000 megabits per second
	1394	A high speed serial bus specification from the Institute of Electrical and Electronics Engineers.
	16-bit program	a program that runs on Intel microprocessors using only the features of the 8088 or 80286, with 16-bit internal registers. Most DOS applications and many earlier Windows applications are 16-bit programs.
	2-205 rule	A rule for the configuration of 100Base-T, or Fast Ethernet, networks. According to the rule, the maximum network distance, or network diameter, of two non-stackable network hubs connected by copper cabling cannot exceed 205 meters
	301 redirect	A notice which appears on your browser when you have clicked on a link to a page which has been permanently moved or deleted.
	32-bit program	a program that uses the 32-bit internal registers and large memory capacity of the Intel 386, 486, Pentium, or other compatible micro processor
	3-4-5 Rule or 5-4-3 Rule	A rule which was invoked in the days of the repeater, and is still appropriate in hubs or switched networks. The original repeaters were designed to extend the range of a network wire beyond the maximum length of the wire's design distance. This was usually used to set up a network, cross al hall or between buildings, set up another network, etc.
	3Com	3 Com Corporation (The 3 Coms are Computer, Communications and Compatibility)
	3D Printing	3D printers deposit resin, plastic or another material, layer by layer, to build up a physical model. Inkjet 3D printers image successive layers of plastic powder, hardening each layer on contact, to build up the piece.
	403	FORBIDDEN HTTP error message indicating that the HTTP server is not permitted to read a file
	404	Originally a technical term for 404 Not Found page. The requested resource no longer exists or has been moved, or the address may be misspelled. more...
	4× ×, 8× ×, 16× × . . . 64×	describing a CD or DVD drive, able to transfer data at 4, 8, 16 (etc.) times the speed of normal audio or video.
	5.1	a format of SURROUND SOUND with five speakers that transmit the full audio spectrum and one that transmits only bass.
	501 error	An error message displayed by your browser when the server the website is hosted on is unable to provide the webpage you are looking for.
	56k	The fastest modem speed supported by a dial up modem.
	6.1	a format of SURROUND SOUND with six full-range speakers in the left front, center front, right front, left, right, and rear center positions, plus a SUBWOOFER for additional bass.
	6BONE	The Internet's experimental IPv6 network.
	7.1	a format of SURROUND SOUND with seven full-range speakers in the left front, center front, right front, left, right, left rear, and right rear positions, plus a SUBWOOFER for additional bass.
	80x86	A family of Intel microprocessors once used in IBM-compatible PCs and workstations. It includes the 80286, 80386 and 80486. The first Pentium processors are members of the same family, but the numerical designations have been dropped.
	802.x	A set of IEEE standards for the definition of LAN protocols.
	80 PLUS	performance specification requires multi-output power supplies in computers and servers to be 80% or greater energy efficient at 20%, 50% and 100% of rated load with a true power factor of 0.9 or greater. http://www.80plus.org/