Browse Definitions :

Browse Definitions by Alphabet

PHL - POL

  • phlashing - Phlashing is a permanent denial of service (PDoS) attack that exploits a vulnerability in network-based firmware updates.
  • photoconductivity - Photoconductivity is the tendency of a substance to conduct electricity to an extent that depends on the intensity of light-radiant energy (usually infrared transmission or visible light) striking the surface of a sample.
  • photocopier - A photocopier is an electronic machine that makes copies of images and documents.
  • photolithography - Photolithography is the standard method of printed circuit board (PCB) and microprocessor fabrication.
  • photon - In some ways, visible light behaves like a wave phenomenon, but in other respects it acts like a stream of high-speed, submicroscopic particles.
  • photonics - Photonics is an area of study that involves the use of radiant energy (such as light), whose fundamental element is the photon.
  • photosensor - A photosensor is an electronic component that detects the presence of visible light, infrared transmission (IR), and/or ultraviolet (UV) energy.
  • Photoshop - Photoshop is an image creation, graphic design and photo editing software developed by Adobe.
  • photovoltaic cell (PV Cell) - A photovoltaic cell (PV cell) is a specialized semiconductor diode that converts visible light into direct current (DC).
  • photovoltaic glass (PV glass) - Photovoltaic glass (PV glass) is a technology that enables the conversion of light into electricity.
  • PHP (Hypertext Preprocessor) - PHP is a script language and interpreter that is freely available and used primarily on Linux Web servers.
  • phreak - A phreak is someone who breaks into the telephone network illegally, typically to make free long-distance phone calls or to tap phone lines.
  • phubbing - Phubbing, a contraction of the words “phone snubbing,” is the act of ignoring a companion in favor of using a smartphone.
  • phygital - Companies are seeking to combine physical and digital (phygital) communication channels and provide customers with a seamless experience.
  • physical address - A physical address is a binary number in the form of logical high and low states on an address bus that corresponds to a particular cell of primary storage (also called main memory), or to a particular register in a memory-mapped I/O (input/output) device.
  • physical attack surface - The physical attack surface is the totality of the security vulnerabilities in a given system that are available to an attacker in the same location as the target.
  • physical computer - A physical computer is a hardware-based device, such as a personal computer.
  • physical layer - Located at the lowest layer of the Open Systems Interconnection (OSI) communications model, the physical layer's function is to transport data using electrical, mechanical or procedural interfaces.
  • physical security - Physical security is the protection of personnel, hardware, software, networks and data from physical actions and events that could cause serious loss or damage to an enterprise, agency or institution.
  • physical to virtual (P2V) - Physical to virtual (P2V), also called hardware virtualization, refers to the migration of physical machines to virtual machines (VMs).
  • physical unit (PU) - In IBM's Systems Network Architecture (SNA), a physical unit (PU) identifies a network node that supports communication sessions between logical units (LU).
  • physiognomy - Physiognomy is a pseudoscience based on associating personal characteristics and traits with physical differences, and especially with elements of people's faces.
  • pi - Pi is a numerical constant that represents the ratio of a circle's circumference to its diameter on a flat plane surface.
  • PIC microcontrollers - PIC microcontrollers are a family of specialized microcontroller chips produced by Microchip Technology in Chandler, Arizona.
  • PICK chart (Possible, Implement, Challenge and Kill chart) - A PICK chart (Possible, Implement, Challenge and Kill chart) is a visual tool for organizing ideas.
  • pick to light - Pick to light is order-fulfillment technology that employs alphanumeric displays and buttons at storage locations to guide the manual "picking" and recording of items for shipment.
  • pick two (pick any two) - Pick two is the principle that, for any given three desirable qualities, you are likely to only be able to achieve two out of the three.
  • pico projector - A pico projector is a small hardware device designed to project content from a smartphone, camera, notebook or memory device, typically for content viewing or presentations.
  • picofarad per meter (pF/m) - The picofarad per meter (symbolized pF/m) is a unit of electric permittivity, a constant of proportionality that exists between electric displacement and electric field intensity.
  • picoliter - A picoliter is a trillionth (one millionth of a millionth, or 10 to the -12th power) of a liter, which can be represented numerically as 0.
  • pictograph - In graph theory, a pictograph is a graph that shows numerical information by using picture symbols or icons to represent data sets.
  • Picture in Picture (PIP) - Picture in Picture (PIP) is a video effect which places several complete images on the screen at the same time.
  • pie graph (or pie chart) - A pie graph (or pie chart) is a specialized graph used in statistics.
  • piezoelectricity - Piezoelectricity, also called the piezoelectric effect, is the ability of certain materials to generate an AC (alternating current) voltage when subjected to mechanical stress or vibration, or to vibrate when subjected to an AC voltage, or both.
  • piggybacking - Piggybacking, in a wireless communications context, is the unauthorized use of a wireless LAN.
  • pigs and chickens - Pigs and chickens is an analogy used in the Scrum software development model to define the type of role an attendee can play at a daily scrum meeting.
  • pilot conversion - A pilot conversion is a hardware or software migration method that involves rolling out the new system to a small group of users for testing and evaluation.
  • pilot program (pilot study) - A pilot program, also called a feasibility study or experimental trial, is a small-scale experiment that helps an organization learn how a large-scale project might work in practice.
  • PIN lock - The PIN lock is an authentication measure for mobile phones that requires the entry of a personal identification number (PIN) code before a device can be used.
  • pin or PIN - A pin is a pronged contact as part of a signal interface in a computer or other communications device.
  • ping - A ping (Packet Internet or Inter-Network Groper) is a basic internet program that enables a user to test and verify if a particular destination Internet Protocol (IP) address exists and can accept requests in computer network administration.
  • ping sweep (ICMP sweep) - A ping sweep (also known as an ICMP sweep) is a basic network scanning technique used to determine which of a range of IP addresses map to live hosts (computers).
  • Pinterest - Pinterest is a social curation website for sharing and categorizing images found online.
  • PIO (Programmed Input/Output) - Programmed Input/Output (PIO) is a way of moving data between devices in a computer in which all data must pass through the processor.
  • pipe - In computer programming, especially in UNIX operating systems, a pipe is a technique for passing information from one program process to another.
  • pipelining - In computers, a pipeline is the continuous and somewhat overlapped movement of instruction to the processor or in the arithmetic steps taken by the processor to perform an instruction.
  • piracy - Software piracy is the illegal copying, distribution, or use of software.
  • pivot table - A pivot table is a statistics tool that summarizes and reorganizes selected columns and rows of data in a spreadsheet or database table to obtain a desired report.
  • Pivot3 - Pivot3 is a hyperconverged appliance vendor that has deployed over 16,000 infrastructures and all-flash arrays in over 50 countries around the world.
  • pixel - The pixel (a word invented from "picture element") is the basic unit of programmable color on a computer display or in a computer image.
  • pixilated - Pixilated, an adjective derived from pixie (a fairy elf), describes someone who is whimsical or bemused, slightly drunk (tipsy), or, according to Webster's, "somewhat unbalanced mentally.
  • pizza box server - The term "pizza box server" refers to the shape of a computer server enclosed in a rectangular and horizontally-arranged chassis and often installed in a rack with similar servers.
  • PKI (public key infrastructure) - PKI (public key infrastructure) is the underlying framework that enables entities -- users and servers -- to securely exchange information using digital certificates.
  • PL/I - PL/I is a third-generation (3GL) programming language developed in the early 1960s as an alternative to assembler language (for low-level computer processing functions), COBOL (for large-scale business applications), and FORTRAN (for scientific and algorithmic applications).
  • PL/SQL (procedural language extension to Structured Query Language) - In Oracle database management, PL/SQL is a procedural language extension to Structured Query Language (SQL).
  • placeshifting - Placeshifting (or place shifting) is a technology that allows anyone with a broadband Internet connection to have video streams from their home television set or personal video recorder (PVR) forwarded for viewing at any location where they have a computer display and a high-speed Internet connection.
  • Plain Old Telephone Service (POTS) - Plain Old Telephone Service (POTS) refers to the traditional, analog voice transmission phone system implemented over physical copper wires (twisted pair).
  • plaintext - In cryptography, plaintext is usually ordinary readable text before it is encrypted into ciphertext or after it is decrypted.
  • Planck's constant - Planck's constant, symbolized h, relates the energy in one quantum (photon) of electromagnetic radiation to the frequency of that radiation.
  • plane (in networking) - A plane, in a networking context, is one of three integral components of a telecommunications architecture.
  • planning board - In agile software development, a planning board is used to track the progress of an project.
  • planning game - In agile software development, a planning game is a meeting attended by both IT and business teams that is focused on choosing stories for a release or iteration.
  • planning poker - Planning Poker is a teambuilding activity for achieving group consensus.
  • planogram - A planogram is a diagram that shows how and where specific retail products should be placed on retail shelves or displays in order to increase customer purchases.
  • plasma - Plasma is a form of matter in which many of the electrons wander around freely among the nuclei of the atom s.
  • plasma display - A plasma display is a computer video display in which each pixel on the screen is illuminated by a tiny bit of plasma or charged gas, somewhat like a tiny neon light.
  • plasma TV - Plasma TV is a television display technology in which each pixel on the screen is illuminated by a tiny bit of plasma (charged gas).
  • platform - In IT, a platform is any hardware or software used to host an application or service.
  • platform business model - A platform business model is a plan for creating revenue by allowing registered members to create content that can be consumed by a specific user group or general audience.
  • platform economy - Platform economy is the tendency for commerce to increasingly move towards and favor digital platform business models.
  • Playstation - Playstation is a video game console developed by Sony.
  • plenum - In buildings, a plenum is a separate space provided for air circulation for heating, ventilation, and air-conditioning (sometimes referred to as HVAC) and typically provided in the space between the structural ceiling and a drop-down ceiling.
  • plesiochronous - Plesiochronous (pronounced plee-see-AH-krun-us, from Greek plesos, meaning close, and chronos, meaning time) is an adjective that describes operations that are almost, but not quite, in synchronization - in other words, almost synchronous.
  • plotter - A plotter is a printer that interprets commands from a computer to make line drawings on paper with one or more automated pens.
  • plug-in - Plug-in applications are programs that can easily be installed and used as part of your Web browser.
  • plug-in hybrid electric vehicle (PHEV) - A plug-in hybrid electric vehicle (PHEV) is a type of hybrid electric vehicle that combines a gasoline or diesel engine with an electric motor and a large battery, which can be recharged by plugging it into an electrical outlet or charging stations.
  • Plundervolt - Plundervolt is a method of hacking that involves depriving an Intel chip of power so that processing errors occur.
  • Plutchik's wheel of emotions - Plutchik's wheel of emotions is a model of human emotions that uses overlaying colors to portray combinations of affect.
  • PMI (plus, minus, interesting) retrospective - PMI (plus, minus, interesting) is a brainstorming activity that encourages participants in a discussion to look at an idea from more than one viewpoint.
  • PMO (project management office) - A project management office (PMO) is a group or department within a business, agency or enterprise that defines and maintains standards for project management within the organization.
  • pneumatics - Pneumatics (pronounced new-MATT-ix) is an aspect of physics and engineering that is concerned with using the energy in compressed gas to make something move or work.
  • pNFS (Parallel NFS) - The Parallel Network File System (pNFS) is part of the NFS v4.
  • PNG (Portable Network Graphics) - PNG (Portable Network Graphics) is a file format used for lossless image compression.
  • pocket PC (pocket personal computer) - A pocket PC (pocket personal computer) is a hardware specification for a small, handheld computer, personal digital assistant (PDA) or smartphone.
  • podcasting - Podcasting is the preparation and distribution of audio files using RSS feeds to the computers or mobile devices of subscribed users.
  • Podcasting Terms: Glossary - This glossary of podcasting terms defines the most common technologies and concepts that anyone will encounter in creating or consuming podcasts.
  • point cloud - A point cloud is a collection of data points defined by a given coordinates system.
  • point of care (POC) testing - Point of care (POC) testing is medical testing that is performed outside of a laboratory setting.
  • point of sale platform - A point of sale platform is software that supports the completion of a retail transaction.
  • point-in-time snapshot (PIT snapshot) - Point-in-time snapshots are a method of data protection that allows an administrator to make a full copy of a volume so that a restore can occur based on a specific time.
  • point-of-presence (POP) - On the Internet, a point-of-presence (POP) is an access point from one place to the rest of the Internet.
  • point-of-sale security (POS security) - Point-of-sale security (POS security) is the study of vulnerabilities in retail checkout points and prevention of access by unauthorized parties looking to steal customer and payment card details from them.
  • point-of-sale terminal (POS terminal) - A point-of-sale (POS) terminal is a computerized replacement for a cash register.
  • point-to-point graph (line graph) - A point-to-point graph, also called a line graph, is a pictorial rendition of data in which specific values of a function are plotted as dots on a coordinate plane.
  • Point-to-Point Protocol (PPP) - Point-to-Point Protocol (PPP) refers to a suite of computer communication protocols that provide a standard way to transport multiprotocol data over point-to-point links.
  • Point-to-Point Protocol over Ethernet (PPPoE) - Point-to-Point Protocol over Ethernet (PPPoE) is a network protocol that facilitates communication between network endpoints.
  • poison reverse - In a computer network that uses the Routing Information Protocol (RIP) or other distance vector routing protocol, poison reverse is a loop avoidance process.
  • poka-yoke - A poka-yoke is a mechanism that is put in place to prevent human error.
  • polarity - Polarity is a term used in electricity, magnetism, and electronic signaling.
  • polarization (wave polarization) - Polarization, also called wave polarization, is an expression of the orientation of the lines of electric flux in an electromagnetic field (EM field).
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