A computer that utilizes an electronic pen (called a stylus) rather than a keyboard for input. Pen computers generally require special operating systems that support handwriting recognition so that users can write on the screen or on a tablet instead of typing on a keyboard. Most pen computers are hand-held devices, which are too small for a full-size keyboard.
- pen tool
In graphics software, the pen tool is frequently used in the creation of smooth-edged selections, but is not a type of selection tool. The Pen Tool creates vector paths that can be converted into selections that in turn can be used to extract or mask groups of pixels.
- perceptual coding
In digital audio perceptual coding is a coding method used to reduce the amount of data needed to produce high-quality sound. Perceptual coding takes advantage of the human ear, screening out a certain amount of sound that is perceived as noise. In perceptual coding you reduce or eliminate the sounds that the ear would perceive […]
- perfect forward secrecy
A key-establishment protocol, used to secure VPN communications. If one encryption key is compromised only data encrypted by that specific key is compromised. For perfect forward secrecy (PFS) to exist the key used to protect transmission of data must not be used to derive any additional keys.
In satellite communications, most satellites orbit the earth in elliptical patterns with the earth not in the exact center of the orbital pattern. When a satellite is at its closest point to the earth, it is at the perigee of the orbit. When a satellite is at its furthest point from the earth, it is […]
- a Peripheral Device
A peripheral device is defined as a computer device, such as a keyboard or printer, that is not part of the essential computer (i.e., the memory and microprocessor). These auxiliary devices are intended to be connected to the computer and used. Types of Peripheral Devices Peripheral devices can be external or internal. Examples of external […]