Unformatted text preview: such as entertainment, home
management, and hobbies.
Personal Digital Assistant (PDA): A pocked-sized computer having facilities such
as calendar, calculator, notepad, etc.
Phase Alternating Line (PAL): A television broadcasting standard used in India
and Western Europe (except France).
Phase modulation: A form of modulation in which two binary values of digital
data are represented by the shift in phase of the- carrier signal. That is, a sine wave
with phase = 0° represents a digital 1 and a sine wave with phase = 180°
represents a digital 0.
Picosecond: One trillionth of a second.
Pixel: A picture element. It is used to represent one point in a raster scan display
PL/1 (Programming Language One): A high-level programming language
designed for handling both scientific and business applications.
Plotter: An output device often used by architects, engineers, city planners, and
others who need to routinely generate high-precision, hard-copy graphic output of
widely varying sizes. Point-and-draw devices: Input devices that can be used to rapidly point to and
select a particular graphic icon or menu item from the multiple options displayed
on the screen. Many of these devices can also be very effectively used to create
graphic elements on the screen, such as lines, curves and freehand shapes. Some of
the commonly used point-and-draw devices are mouse, trackball, joystick,
electronic pen and touch screen.
Point-Of-Sale (POS) device: An I/O device capable of immediately updating sales
and inventory records at a central CPU and producing a printed sales transaction
Portrait mode: A mode of printing in which the printed lines are parallel to the
shorter edge of the paper.
Positional number system: A number system in which there are only a few
symbols called digits, and these symbols represent different values depending on
the position they occupy in the number. The value of each digit in such a number
is determined by the digit itself, the position of the digit in the number, and the
base of the number system.
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- Spring '14