A wireless phone service similar to cellular telephone service but emphasizing personal service and extended mobility. PCS is for mobile users and requires a number of antennas to blanket an area of coverage. 

A general-purpose computer useful for individuals which is intended to be operated directly by an end-user with no intervening computer operator.  It may be in a form of a desktop computer, laptop, tablet, or a handheld PC.

The first widely-installed operating system used in personal computers. PC-DOS was (and still is) a non-graphical line-oriented command-driven operating system, with a relatively simple interface but not overly "friendly" user interface. 

A term for any small mobile hand-held device that provides computing and information storage and retrieval capabilities for personal or business use, often for keeping schedule calendars and address book information handy. 

A software application used to protect a single Internet-connected computer from intruders. It is especially useful for users with "always-on" connections such as DSL or cable modem.

An interactive TV recording device in a form of a set-top box. Vendors and media also refer to the units by these names: digital video recorder (DVR); personal TV receiver (PTR); personal video station (PVS); and hard disk recorder (HDR).

Microsoft's version of a Web server program for individual PC users who want to share Web pages and other files from their hard drive. PWS can be used with a full-time Internet connection to serve Web pages for a Web site with limited traffic. 

A knowledge management tool used to provide an evaluation of an employee's personal attributes, values and life skills in an effort to maximize his or her job performance and contribution to the company. 

Now considered a Sun legacy product, PersonalJava is or was a software development platform for creating network-capable applications for various consumer devices for office, home, and mobile use. 

A project management tool used to schedule, organize, and coordinate tasks within a project. A PERT chart presents a graphic illustration of a project as a network diagram consisting of numbered nodes representing evens.

pfSense is a free, open source customized software that can be used as a firewall and router that is entirely managed via web interface. In addition to being a powerful, flexible firewalling and routing platform, it includes a long list of related features and a package system allowing further expandability without adding bloat and potential security vulnerabilities to the base distribution.

A phablet is a class of mobile device designed to combine or straddle the functions of a smartphone and tablet.

A form of computer RAM that stores data by altering the state of the matter from which the device is fabricated. PCM technology has the potential to provide inexpensive, high-speed, high-density, high-volume nonvolatile storage.

A method of digital communication in which the phase of a transmitted signal is varied to convey information. There are several methods that can be used to accomplish PSK. The simplest PSK technique is called binary phase-shift keying (BPSK).

A new memory microchip technology that offers vastly greater capacity than memory devices commonly used in the past. The images and sound for a full-length movie can be stored on a single PLEDM device. 

Phaser is an open source HTML5 game framework created by Photon Storm. It's designed to create games that will run on desktop and mobile web browsers. A lot of focus was given to performance inside of mobile web browsers, a growing and important area of web gaming. If the device is capable then it uses WebGL for rendering, but otherwise it seamlessly reverts to Canvas