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L for Linux
|Abbreviation / acronyms||Term||Definition|
|l10n||localization||There are ten letters between the "l" and the "n"|
|L1 / L2 cache||level-1/2 cache||L1: the memory cache that is closest to the CPU or included within it. L2: a memory cache outside the CPU|
|L2CAP||Logical Link and Control Adaptation Protocol||a Bluetooth Specific Protocol|
|L2F||Layer 2 Forwarding||a tunneling protocol from Cisco Systems. L2F has been submitted to the IETF for approval as a standard.|
|L2S||Layer 2 Switch||Layer 2 Switch|
|L2TP||Layer 2 Tunneling Protocol||A protocol that combines the features of Microsoft's PPTP and Cisco Systems' L2F to support multiprotocol or private-address IP traffic across a public IP network. L2TP is a mature Internet Engineering Task Force standard that has been widely implemented.|
|L3F||Layer 3 Forwarding||a tunneling protocol from Cisco Systems. L3F has been submitted to the IETF for approval as a standard.|
|L3S||Layer 3 Switch||Layer 3 Switch|
|L3TP||Layer Three Tunneling Protocol||an extension to the PPP protocol that enables ISPs to operate VPNs. L3TP merges the best features of three other tunneling protocols|
|LA||Load Address||LA is an IBM term|
|LAC||L2tp Access Concentrator||Device attached to the switched network or located on an end system supporting L2TP to pass PPP traffic|
|LACNIC||Latin American and Caribbean Internet Addresses Registry||one of four regional Internet registries that supply and administer IP addresses.|
|LACP||Link Aggregation Control Protocol||Part of an IEEE specification (802.3ad) that allows to bundle several physical ports together to form a single logical channel|
|LADDR||Layered Device Driver||s SCSI device driver architecture used in early versions of OS/2.|
|LAI||Location Area Identity||the information carried in the SIM of GSM handsets that identify the subscriber's home area. This is used for billing and sub-net operation purposes.|
|LAIPE||Link And In Parallel Execute|| a high-performance package for scientific and engineering computing, programmed in MTASK.
|LAMP||Linux, Apache, MySQL and PHP||Also defined as Linux, Apache, MySQL and Pythor or Perl. The term LAMP is used to describe a web based solution produced using PHP (scripting), MySQL (database), Apache (web-server) under Linux (operating system), each of which are free to download. It therefore describes a website using free off-the-shelf components.|
|LAN||Local Area Network||
A network of interconnected workstations sharing the resources of a single processor or server within a relatively small geographic area. Typically, this might be within the area of a small office building.
|LANE||Local Area Network Emulation||A set of services and protocols that provide for the emulation of LANs, using ATM as a backbone to allow connectivity among LAN and ATM attached end stations|
|LAPD||Link Access Procedures on the D channel||specified in ITU-T Q.920 and ITU-T Q.921, is the second layer protocol on the ISDN protocol stack in the D channel.|
|LAS||logical application structure||A structure of the application to be deployed that is made up of software definitions.|
|laser||light amplification by stimulated emission of radiation||Analog transmission device in which a suitable active material is excited by an external stimulus to produce a narrow beam of coherent light that can be modulated into pulses to carry data. Networks based on laser technology are sometimes run over SONET.|
|LASINT||laser intelligence||Technical and geolocation intelligence derived from laser systems; a subcategory of electro-optical intelligence.|
|LAT||Local Address Table||A table containing the IP address range that is inside a firewalled network|
|LATA||Local Access and Transport Area||Denotes a geographical area established for the provision and administration of communications service. It encompasses one or more designated exchanges, which are grouped to serve common social, economic, and other purposes.|
|LBA||Logical Block Addressing||a method of accessing hard disk drives. It allows IDE disks larger than 504 megabytes (1024 cylinders) in size to be fully partitioned using the MS-DOS fdisk command.|
|LBAC||label-based access control||A security mechanism that uses security labels to restrict user access to individual table rows and columns.|
|LBS||Location-based service||Services or applications that center around a user’s location in a mobile environment. Services include finder applications that let mobile phone users locate friends or family, businesses or landmarks.|
|LBG||load balancing group||A grouping of Fast Path input messages that are ready for balanced processing by one or more copies of a Fast Path program.|
|LBO||line buildout||Abbreviation for line buildout. Synonym building out.|
|LCC / LLCC||Leaded Chip Carrier / Leadless Chip Carrier||
A square chip package with pin connectors on each side.
a type of packaging for integrated circuits which has no "leads", but instead rounded pins through the edges of the ceramic package.
|LCC||Limited combustible cable||also called CMP-50 cable, is fire-resistant cable with insulation made of a synthetic material called fluorinated ethylene propylene (FEP).|
|LCD||liquid crystal display||A low-powered, flat-panel display technology. LCD displays create images using liquid crystal molecules controlled by an electrical field.|
|LCI||local component installer||In IBM Tivoli Kernel Services, the component that pulls and runs native code, shared libraries, and installation scripts that are needed for deploying components.|
|LCM||Life Cycle Management||the management of the entire life of a program including the three typical phases: transition, transformation & end-state|
|LCN||local communication network||A communication network within a TMN (telecommunications management network) that supports data communication functions (DCFs) normally at reference points q1 and q2.|
language context object
A context server object that mediates the routing of inbound customer interactions as well as the supply of outbound responses in a language-appropriate manner.
|LCOS||Liquid Crystal On Silicon||TV technology for flat screen displays; a technology that most major technology and equipment manufacturers have shunned after experimentation.|
|LCP||Link Control Protocol||Part of the PPP to establish, configure, and test data link connections|
least cost routing
Lifetime Clinical Record
Line Concentration Ratio
Local Continuous Replication
Method for automatic selection of the least costly facility for transmission of a call. Synonyms: Most Economical Route Selection (MERS); Route Optimization; Automatic Route Selection; Flexible Route Selection.
A computer-based patient record system from Siemens Medical Solutions Health Services. LCR provides a longitudinal view of patients' lifetime clinical histories.
A CO (Central Office) design and engineering term for the optimization of system capacity through the classic act of balancing cost and performance.
Microsoft Exchange's ability to replicate locally between two disk volumes
Liquid Cooling System
a type of cooling system in a computer, which consists of one or more water blocks, a pump, a radiator, one or more fans, tubing, cooling liquid, and may also include a reservoir and fittings.
Microsoft collaboration infrastructure
|LD||Laser Disc||An optical disc which stores information that can be read by a laser beam. Laser discs can be used to store data, but are usually used for video and audio together. Laser discs come in 8" and 12" diameters.|
|LDA||Local delivery agent||A mail service agent that transfers mail messages from incoming mail storage to the email recipient’s inbox.|
|LDAP||Lightweight Directory Access Protocol||
If you want to make directory information available over the Internet, this is the way to do it. LDAP is a streamlined version of an earlier directory standard called X.500. What makes LDAP so useful is that it works great over TCP/IP networks, so information can be accessed through LDAP by anyone with an Internet connection.
|LDCM||LANDesk Client Manager||developed by Intel, is a management tool that constantly monitors networked personal computers and workstations for hardware problems.|
|LDIF||LDAP Data Interchange Format||a file format that is widely used for building a database of directories that are stored on multiple servers, for adding large numbers of directories to a directory database, and for synchronizing the contents of those directories. The servers on which the directories are stored must support the LDAP protocol.|
|LDM||limited distance modem||limited distance modem|
|LDP||Label Distribution Protocol||A fundamental concept in MPLS is that two Label Switching Routers must agree on the meaning of the labels used to forward traffic between and through them|
|LDPC||low-density parity-check code||an error-correcting code and a method of transmitting a message over a noisy transmission channel.|
|LDR||Light Dependent Resistor||This is a special type of resistor and is sometimes called a photoconductor. LDRs are made so that their resistance decreases as the level of light falling on them increases.|
|LDS||logical data stream||In bidirectional text representation, a stream of data that is organized in a readable sequence.|
|LDT||Lightning Data Transfer (Bus)||An interconnection standard introduced by AMD that allows for fast data transfers among the Northbridge part of a chipset, the PCI bus(es), and the Southbridge part.|
|LEAP||Lightweight Extensible Authentication Protocol||also known as Cisco-Wireless EAP, is a Cisco security technology that builds on Wi-Fi's WEP encryption.|
|LED||light-emitting diode||A semiconductor that produces light when activated.|
|LEED||Leadership in Energy and Environmental Design||LEED) consists of a suite of rating systems for the design, construction and operation of high performance.|
|LEL||Link, Embed and Launch-to-edit||Lotus term|
|LEO||Low Earth Orbit||the orbit between 700 and 2,000 kilometers above the Earth for Mobile communications satellite.|
|LER||Label Edge Router||Converts IP packets into MPLS packets, and MPLS packets into IP packets. On the ingress side, the LER examines the incoming packet to determine whether the packet should be labeled.|
|LF||Line Feed||Feeding the paper through the printer just far enough to print the next line. Also, a button or computer instruction that activates a line feed|
|LFB||look-ahead-for-busy||Information concerning network resources available to support higher precedence calls.|
|LFS||Linux From Scratch||Project that provides you with the steps necessary to build your own custom Linux system|
|LGA||Land Grid Aray||also known as socket T,means that the pins are on the Motherboard, not the Processor. The Prescott is using the LGA 775 socket.|
|LGPL||Lesser General Public License (GNU)||An evolution of the Library GNU|
In distributed relational database, an identifier or short label that is mapped by the environmental descriptors to a named resource.
A 1-byte identifier assigned to parts of the data stream to facilitate PSF processing.
|LIDE||Light emitting diode In-Direct Exposure||Scanner technology by Canon|
|LIFO||last in, first out||A type of message queuing that puts the last message received first in line.|
|LINAC||Linear Accelerator||a particle accelerator commonly used for external beam radiation treatments of cancer patients. LINAc uses microwave technology to accelerate charged particles.|
|Lion / Li-ion||Lithium-ion||a type of rechargeable battery widely used in portable computers.|
|LION||Lower Indian Ocean Network||LION cable system|
|LIP||Loop Initialization Process||The process by which a Fibre Channel arbitrated loop network initializes when started up, or recovers after a failure occurs or a new device appears on the network.|
|LIPS||Logical Inferences Per Second||In artificial intelligence, the speed at which an application can process instructions. The human brain works at about 2 LIPS.|
|LIS||Laboratory information system||a class of software which handles storing information generated by laboratory processes. These systems often must interface with instruments and other information systems such as HIS.|
|Lisp||List Processor or List Processing||A programming language developed at MIT in the 1950s by John McCarthy.|
|LKM||Loadable Kernel Modules||allow for the adding of additional functionality directly into the kernel while the system is running.|
|LL||local loop||A generic term for the connection between the customer’s premises (home, office, etc.) and the provider’s serving central office|
|LLC||Logical Link Control||IEEE 802.2 LAN protocol that specifies an implementation of the LLC sublayer of the data link layer.|
|LLDP||Link Layer Discovery Protocol||LLDP is a vendor-neutral Layer 2 protocol that allows a network device to advertise its identity and capabilities on the local network.|
|LLDP-MED||Link Layer Discovery Protocol-Media Endpoint Discovery||LLDP-MED is an enhancement to the LLDP that is designed to allow auto-discovery of LAN policies|
Low Latency Interrupts
Lower Layer Interface
allows latency-sensitive packets to be processed with the lowest latency.
Part of layer 7 with PROFIBUS, in which layer 7 services are mapped onto layer 2 services
|LLTD||Link Layer Topology Discovery||A feature that helps users to troubleshoot their networks. LLTD automatically detects multiple network devices and gives a graphical presentation of the connected hardware to identify configuration errors.|
LLU is the process of allowing competitive telecommunications operators to use the twisted-pair telephone connections from the incumbent telephone exchange's central office to the customer premises. This local loop is owned by the ILEC.
|LMA||Lightspeed Memory Architecture||nVidia term|
|LMDS||Local Multipoint Distribution Services||This is a fixed point (non-mobile) wireless technology that operates in the 28 GHz band and offers line of sight coverage over distances up to 5 kilometers. It can deliver data and telephony services to 80,000 customers from a single node.|
|LMP||Link Manager Protocol||a data link layer protocol in the Bluetooth protocol stack. LMP carries out link setup, authentication, link configuration and other protocols.|
|LMPP||Lighttpd/MySQL/PHP/Python||A web application stack based upon lighttpd, MySQL, , and/or (compare to LAMP).|
|LMS||Learning Management System||a software package, that enables the management and delivery of learning content and resources to students. Most LMS systems are web-based to facilitate "anytime, anywhere" access to learning content and administration.|
launch numerical aperture
Low Noise Amplifier
The numerical aperture of an optical system used to couple (launch) power into an optical fiber.
a receiving preamplifier having very low internal noise characteristics placed very near the antenna of a receiver to capture the C/N before it can be further degraded by noise in the receiving system.
|LNIB||like new, in box||slightly used but supplied with original packaging|
|LNO||Loop Nest Optimization||a special case of loop transformation which deals with nested loops that makes possible large reductions in the cache bandwidth necessary for some pervasive algorithms.|
|LNP||Local Number Portability||Subscribers' ability to switch local or wireless carriers and still retain the same phone number, as is possible now with long-distance carriers.|
|LNS||L2tp Network Server||Maintains L2TP sessions with whatever is connected to the LAC|
A sequence of bytes with a size ranging from 0 bytes to 2 gigabytes less 1 byte.
A data type used by databases for large objects.
|LOB||Line-of-Business||Used to refer to a business critical application, i.e. an application that is essential to the trading or survival of a business. Normally written as "LOB app" or "LOB application".|
|LOC||Lines of Code||A measure of the size of a program.|
|LOCK||local object creator and killer||In IBM Tivoli Kernel Services, the component that starts, monitors, stops, and restarts an ORB.|
|LODA||Lombardi On-Demand Assistance||IBM Websphere On-Demand Delivery|
|LOFS||LOopback File System||A file system type that lets the user create a new virtual file system. The user can access files using an alternative path name|
|LOM||LAN On Motherboard||This is a network device that is built onto the motherboard (or baseboard) of the machine|
|Loran||long-range radio navigation||A long-range radio navigation position-fixing system consisting of an array of fixed stations that transmit precisely synchronized signals to mobile receivers.|
Line of Sight
Loss of signal
describes an unobstructed radio path or link between the transmitting and receiving antennas of a communications system.
a condition where the received signal drops below threshold due to a terrain obstruction or other phenomenon increasing the link budget loss beyond design parameters.
Linear Power Amplifier
link pack area
The final amplification stage in a multicarrier transmitter that has been designed and optimized to produce a linear response.
The portion of virtual storage below 16MB that contains frequently used modules.
|LPAR / LP||logical partition||
A set of key or RID pairs in a nonpartitioning index that is associated with a particular partition.
One or more subsets of a single system that contains hardware resources and operates as an independent system.
In a partitioned database environment, a database partition server on a processor that has more than one database partition server assigned to it.
A subset of the processor hardware that is defined to support an operating system.
|LPB||Low Ping Bastard||Network multiplayer games attribute|
Linear Predictive Coding
Local Procedure Call
a speech encoding scheme that uses periodic pulses to excite a filter, similar to the way human voice is produced.
A mechanism that loops remote procedure call without the presence of a network so that the client and server portion of an application can reside on the same machine.
|LPD||line printer daemon||
The receiving portion, or target, of a file transfer that receives the spooled file that was sent and places the file on a local output queue.
The printer server that allows other hosts to access its printer.
|LPDA||Link Problem Determination Aid||A series of procedures used by products to test modem or other DCE operations, and to provide information about the DCE and the data link.|
League for Programming Freedom
A nonprofit organization dedicated to "bringing back the freedom of programmers to write programs," in the face of the recent trend toward complicated copyright and patent lawsuits. http://www.lpf.org/
A signal filter which would be installed in a customer premises ADSL modem (ATU-R), which would not modify the low frequencies present in its input signal
|LPFM||low-power FM radio||A broadcast service that permits the licensing of 50- to 100-watt FM radio stations within a service radius of up to 3.5 miles and 1- to 10-watt FM radio stations within a service radius of 1 to 2 miles.|
lines per inch
Linux Professional Insitute
a measure of the resolution of a halftone screen
Serves the community of Linux and open source software users vendors and developers, in the interest of increasing and supporting professional use of such software throughout world. See also http://www.lpi.org/
|LPP||Land Pre-Pits||Addressing aid in writing DVD-R|
|LPPL||Latex Project Public License||http://www.latex-project.org|
|LPR||line printer requester||
The sending portion, or client portion, of a spooled file transfer.
A client that lets the local host submit a file for printing on a remote printer server.
|LPT||line print terminal||The designation for a parallel connection to a printer or other parallel device.|
|LPTV||low-power television||A broadcast service that permits program broadcasting via television translators operating with low power. LPTV service includes the existing translator service and operates on a secondary basis to regular television stations.|
|LPWA||Lucent Personalized Web Assistant||Anonymous web browsing service|
|LPX||Low Profile eXtension / Extended||a motherboard form factor used for low-profile computer cases. LPX boards use a riser card arrangement for expansion cards, which means that installed expansion cards are parallel to the motherboard instead of perpendicular to it.|
|LQA||link quality analysis||In adaptive high-frequency (HF) radio, the overall process by which measurements of signal quality are made, assessed, and analyzed.|
|LQSR||Link Quality Source Routing||a routing protocol for wireless mesh networks. The protocol was developed by Microsoft for use with their MCL technology, which facilitates the interconnection of computers into a mesh network|
|LR||Lightroom||Adobe Photoshop Lightroom is a photography software program developed by Adobe Systems for Mac OS X and Microsoft Windows, designed to assist professional photographers managing thousands of digital images, and do post production work. www.adobe.com/products/photoshoplightroom/|
longitudinal redundancy check
Loop Resiliency Circuit
A system of error control based on the formation of a block check following preset rules.
Hub circuitry that allows devices to be inserted into or removed from an active FC-AL loop.
|LRF||Little Rubber Feet||Support devices for computer cases and other equipments|
|LRN||Location Routing Number||The ten-digit (NPA-NXX-XXXX) number assigned to a switch/POI used for routing in a permanent local number portability environment.|
|LRU||least recently used||Pertaining to an algorithm used to identify and make available the cache space that contains the data that was least recently used.|
|LS||Loop-Start Signaling||A type of switched access line signaling in which the network provides a battery source. To initiate a call, customer premise equipment will provide a loop closure that causes DC loop current to flow, which is detected by the network.|
|LSA||Local Security Authority||The Local Security Authority is the service provided to manage local security, domain authentication, and Active Directory processes. The Security Accounts Manager, Net Logon and Protected Storage services run within the context of lsass.exe|
|LSAP||Link Service Access Point||including both DSAP and SSAP, is the identifier field to indicate data types.|
|LSAS||Local Security Authentication Server||Verifies validity of user logons to PC/Server.|
|LSASS||Local Security Authority Subsystem Service||Provides an interface for managing local security, domain authentication, and Active Directory processes. The Security Accounts Manager, Net Logon and Protected Storage services are components of LSA|
|LSB||Least Significant Bit||The bit of a binary number which is farthest to the right, indicating the number of ones; also designated as bit zero.|
|LSH||Locality-Sensitive Hashing||an algorithm for solving the (approximate/exact) Near Neighbor Search in high dimensional spaces.|
|LSI||Large Scale of Integration||IC manufacturing integration level: it's the process of placing from 3,000 to 100,000 transistors on one chip|
Linux Software Map
Local Service Manager
a standard text format for describing Linux software. LSM for a program is a single text document, named software_package_name.lsm.
In IBM Tivoli Kernel Services, a component that runs on each system that is part of the distributed system.
|LSP||License Service Provider||An Netware Loadable Module (NLM) that responds to requests from NLS clients and licensing service managers for licensing information or license units|
label switch router
Leaf Setup Request
Line Service Request
Local Service Request
The role of an LSR is to forward packets in an MPLS network by looking only at the fixed-length label.
An ATM term. A setup message type used when a leaf node requests connection to existing point-to-multipoint connection or requests creation of a new multipoint connection.
Document in the LEC world which is used for porting requests, directory listing changes, trunk ordering etc.
A term that was spawned by the Telecommunications Act of 1996, which formalized competition in local telecommunications. A LSR is a form, or series of forms, used by a CLEC to request local service from the ILEC.
|LSR||local shared resource||
A file that shares a common pool of buffers and a common pool of strings; that is, control blocks supporting I/O operations, with other files.
In the VSAM, a resource in the local resource pool.
|LSSGR||LATA Switching System Generic Requirements||Multi-volume set of Bellcore technical references dealing with basic switching requirements used by switch manufacturers, procurement staffs, planners, and switch technicians.|
|LTC||line traffic coordinator||In a DDN switching center, the processor that controls traffic on a line.|
Lite Terminating Equipment
next-generation network standard developed by the 3GPP as an evolution of today's 3G mobile networks. The standard, which relies on Internet Protocol end-to-end, aims to deliver higher capacity and greater throughput in a given cell, with maximum target speeds of 100 Mbps downstream and 50 Mbps upstream.
|LTF||Leap To Frogans||http://www.frogans.com/|
|LTM||Local Traffic Managers||F5 product to provide offloading of SSL, connections, compression; intelligent traffic management|
|LTPA||Lightweight Third Party Authentication||
An authentication framework that allows single sign-on across a set of Web servers that fall within an Internet domain.
A protocol that uses cryptography to support security in a distributed environment.
A recoverable unit of work managed by a resource manager and not coordinated by an external transaction manager.
In a multisystem environment, a transaction that is processed totally by the system in which it is defined.
|LTRS||Letters Shift||A code character used to command a Teletype - like device to perform a physical shift for alphabetic characters|
|LTS||Leaning Toothpick Syndrome||Expresses readability in PERL regular expressions|
|LU||Logical Unit||IBM's term for a logical node that is the user's "port" into a SNA network. LU 1 is a high-performance print and 3270 data stream. LU 6 enables host-to-host data exchange, and provides a peer-to-peer data stream.|
|LU-LU||between two logical units||a session between two logical units (LUs) in an SNA network. It provides communication between two end users, or between an end user and an LU services component.|
|LUF||lowest usable high frequency||The lowest frequency in the HF band at which the received field intensity is sufficient to provide the required signal-to-noise ratio for a specified time period, e.g., 0100 to 0200 UTC, on 90% of the undisturbed days of the month.|
|LUN||logical unit number||A number used in a SCSI bus to identify a peripheral device (such as an attached storage system)|
|LUNT||line unit network termination||The customer side of any DSL that does not terminate on the customer installation (CI).|
|LUS||LookUp Service||Provides the functionality to discover and register services|
|LUW||logical unit of work||
The processing that a program performs between synchronization points.
The work that occurs between the start of a transaction and commit or rollback and between subsequent commit and rollback actions.
|LVD||Low Voltage Differential||the Low Voltage Differential interface used in Ultra2 and Ultra3 SCSI.|
|LVDS||Low Voltage Differential Signaling||a low noise, low power, low amplitude method for high-speed (gigabits per second) data transmission over copper wire.|
Logical Volume Manager
Low Voltage Differential Signaling
Provides a higher-level view of the disk storage on a computer system than the traditional view of disks and partitions. This gives the system administrator much more flexibility in allocating storage to applications and users
|LVOL / LV||logical volume||
A collection of physical partitions organized into logical partitions, all contained in a single volume group.
The combined space on all volumes for either the database or the recovery log.
The storage medium associated with a single logical unit (LU).
|LWL||long wavelength||A type of fiber-optic cabling that is based on 1300-mm lasers and supports link speeds of 1.0625 Gbps.|
|LWP||light-weight process||means of achieving multitasking. In contrast to a user thread, which is handled at the application level, a light-weight process is scheduled by the kernel.|
|LZH||Lempel-Ziv-Haruyasu||Compression algorithm with a sliding window and additional compression applied to the output of the LZSS compressor by dynamic Huffman coding|
|LZW||Lempel Ziv Welch||a standard algorithm widely used for compression of data.|
|landline||A telephone circuit that travels over land-based circuits|
|LANlord||The alpha geek responsible for an office's Local Area Network.|
|laptop||A portable PC, with system unit, screen and keyboard crammed into one small package. They can do pretty much everything a desktop PC can do, but are substantially more expensive because of the extra miniaturisation required.|
|last mile||The final leg in delivering connectivity in a telecommunications network. Often perceived as the most critical in terms of both service provision, cost and bandwidth.|
|Latency||The time interval during which a network station seeks access to a transmission channel and access is granted or received.|
|layer||In the OSI reference model, a layer is a collection of related network-processing functions that constitute one level of a hierarchy of functions.|
|Lazy evaluation||a computation optimization technique that attempts to delay computation of expressions until the results of the computation are known to be needed.|
|Leased Line||A private telephone line without inter-exchange switching arrangements. Also called Private Line and Dedicated Line|
|Legacy||Term used to describe enterprise applications or systems installed in the distant past, but still being used. Typically, they are characterized by outdated technologies, but are still critical to day-to-day operations.|
|a social networking site (www.linkedin.com) designed for business professionals to use for work contacts and communication.|
|Linux (“Linus’ UNIX”)||A widely used Open Source Unix-like operating system. Linux was first released by its inventor Linus Torvalds in 1991. There are versions of Linux for almost every available type of computer hardware from desktop machines to IBM mainframes.|
|LISTSERV||a commercial software package for operating e-mail mailing lists and discussion groups, produced by L-Soft International (www.lsoft.com)|
|load balancing||In routing, the capability of a router to distribute traffic over all its network ports that are the same distance from the destination address. Good load-balancing algorithms use both line speed and reliability information.|
|lock||A data structure used to synchronize access to a shared resource. The most common use for a lock is in multithreaded programs where multiple threads need access to global data.|
|log||A record of a computer's or application's activity, used for system information, backup, and recovery.|
|Login||Noun or a verb. Noun: The account name used to gain access to a computer system. Not a secret (contrast with Password). Verb: the act of connecting to a computer system by giving your credentials (usually your "username" and "password")|
|Longhorn||internal code name used for Windows Vista (Windows 6.0) before its release.|
|lookup||searching a data structure for an item that satisfies some specified property.|
|loopback||A diagnostic test that returns the transmitted signal back to the sending device after it has passed through a network or across a particular link. The returned signal can then be compared to the transmitted one. The discrepancy between the two help to trace the fault.|
|lossy||If a process is lossy, it means that a little quality is lost when it is performed. If a format is lossy, it means that putting data into that format will cause some slight loss. Lossy processes and formats are typically used for performance or resource utilization reasons.|
|lurker||A user who does not participate in an online discussion (e.g., in a chat room), but merely observes the activity.|
An Internet search engine (http://www.lycos.com/) created at Carnegie Mellon University.