Panel PC are variants of industrial PCs for use in standard control cabinets , consoles and switchboards . Alternatively, they can be (on an assembly line, for example, as a visualization PC) as a complete system on a stand.

Developed by Plastic Logic, PaperTab has a flexible touchscreen that lets users send files and emails and navigate through pages of documents using hand gestures. One can also combine several PaperTabs into one larger surface by placing them side by side, or share files by touching one tablet to another. PaperTab is powered by an Intel i5 processor, which seems to be separate from the actual display and connected to the PaperTab with a thin data cable

Papervision3D is an open source, 3D, realtime, graphics engine targeting the Adobe Flash (SWF) platform.

Parallel computing is a type of computation in which many calculations or the execution of processes are carried out simultaneously. Large problems can often be divided into smaller ones, which can then be solved at the same time.

Parallel Programming or concurrent programming is concept of compiling and executing parallel progams. The value of parallel programming can be judged by its performance, how efficiently it can be executed.

A program that enables distributed computing among networked computers on different platforms, so that they can perform as a single, large unit for computer-intensive applications. The software can be run on most Unix-based or Windows systems. 

A parameter, in its common meaning, is a characteristic, feature, or measurable factor that can help in defining a particular system.

A special battery-powered form of RAM in certain Macintosh computers where vital system information such as the date and time are stored. 

A parser is a program, usually part of a compiler, that receives input in the form of sequential source program instructions, interactive online commands, markup tags, or some other defined interface and breaks them up into parts.

Pascal is an imperative and procedural programming language intended to encourage good programming practices using structured programming and data structuring. It was the primary high-level language used for development in the Apple Lisa, and in the early years of the Macintosh.

A system that brings optical fiber cabling and signals all or most of the way to the end user. Depending on where the PON terminates, the system can be described as fiber-to-the-curb (FTTC), fiber-to-the-building (FTTB), or fiber-to-the-home (FTTH).

Passive reconnaissance is a type of computer attack in which an intruder attempts to gain information about targeted computers and networks without actively engaging with the systems.

An unspaced sequence of characters used to determine that a computer user requesting access to a computer system is really that particular user. 

  A procedure used by Point-to-Point Protocol servers to validate a connection request.

An application program that is used to identify an unknown or forgotten password to a computer or network resources. It can also be used to help a human cracker obtain unauthorized access to resources.

An authentication process that coordinates user passwords across various computers and computing devices so a user only has to remember a single password instead of multiple passwords for different machines or devices.