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| PCI
| Peripheral
Component Interconnect: a personal computer local bus designed by Intel,
which runs at 33 MHz and supports Plug and Play. | | PCI Express | PCI Express (PCIE) is the next generation bus architecture and is
compatible with the current PCI software environment while offering
low-cost with scalable performance for the next generation of computing
and communications platforms. PCIE is a serial technology with
point-to-point connection to provide 2.5 Gbit/s per lane which is 2
times faster than current PCI technology. PCIE is scalable to form
multiple lanes like x1, x2, x4, x8, x16, and x32. http://www.pcisig.com | | PCMCIA
| Personal
Computer Memory Card International Association: a standard for a credit
card-size memory or input/output device that fits into a notebook,
laptop or personal computer | | PDF | Portable Document Format | | Pixel | Pixels are generally thought of as
the smallest complete sample of an image. The definition is highly
context sensitive. For example, we can speak of pixels in a visible
image (e.g. a printed page) or pixels carried by one or more electronic
signal(s), or represented by one or more digital value(s), or pixels on a
display device, or pixels in a digital camera (photosensor elements).
This list is not exhaustive and depending on context there are several
synonyms which are accurate in particular contexts, e.g. pel, sample,
bytes, bits, dots, spots, superset, triad, stripe set, window, etc. We
can also speak of pixels in the abstract, in particular when using
pixels as a measure of resolution, e.g. 2400 pixels per inch or 640
pixels per line. Dots is often used to mean pixels, especially by
computer sales and marketing people, and gives rise to the abbreviation
DPI or dots per inch. The more pixels used to represent an image, the
closer the result can resemble the original. The number of pixels in an
image is sometimes called the resolution, though resolution has a more
specific definition.
Pixels can be expressed as a single
number, as in a three-megapixel digital camera, which has a nominal
three million pixels, or as a pair of numbers, as in a 640 by 480
display, which has 640 pixels from side to side and 480 from top to
bottom (as in a VGA display), and therefore has a total number of 640 ×
480 = 307,200 pixels. The color samples that form a digitized image
(such as a JPG file used on a web page) are also called pixels.
Depending on how a computer displays an image, these may not be in
one-to-one correspondence with screen pixels. In areas where the
distinction is important, the dots in the image file may be called
texels. In computer programming, an image composed of pixels is known
as a bitmapped image or a raster image. The word raster originates from
analogue television technology. Bitmapped images are used to encode
digital video and to produce computer-generated art. | | PMC | PCI Mezzanine Card: a daughtercard form factor implementation of the PCI bus specification | | Polarization
| A process whereby light waves are restricted in the direction of their vibration | | Power 1/X | Power 1/X Reduces contrast in bright regions. | | Power X | Power X Reduces contrast in bright regions. | | Processor Bit Rate
| The rate at which data is processed by a CPU | Proper Close
| See Close Proper | Proper Open
| See Open Proper |
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