Technology
Articles about devices, tools, digital systems and innovation.
Opera (web browser)
Operating system
Operating system (OS): overview, components, history and uses
An operating system manages hardware and software resources, provides common services to programs, and offers user interfaces. This article explains components, functions, types, h
Opportunity (rover)
Opportunity (MER-B) — NASA's Mars Exploration Rover 'Oppy'
Optical character recognition
Optical character recognition (OCR): technology, methods and applications
Optical disc drive
Optical fiber
Optimization (computer science)
OR gate
Oracle Database
ORCID
ORCID (Open Researcher and Contributor ID)
Organic light-emitting diode
Organic light-emitting diode (OLED): principles, history, and applications
OS X El Capitan
OS X El Capitan (10.11) — Apple's performance‑focused macOS release
OS X Mavericks
OS X Mavericks (10.9) — Apple desktop operating system
OS X Mountain Lion
OS X Mountain Lion (10.8) — Apple’s 2012 Macintosh operating system
OS X Yosemite
OS X Yosemite (version 10.10)
Oscilloscope
Oscilloscope — Instrument for Displaying Electrical Signals
Output device
Output device (computer peripheral)
Oven
Oven: Types, Function, History and Uses
Overclocking
Overhead projector
Overhead projector: design, history, and educational uses
Pac-Man
Pac-Man: the iconic 1980 arcade maze game
Package management system
Padlock
Padlock: portable lock types, design, uses, history and security
Page cache
Page cache: in-memory caching of file data in virtual memory systems
Page replacement algorithm
Palm OS
Panasonic Q
Paparazzi Project
Paper clip
Paper mill
Paper towel
Parabolic trough
Parabolic Trough: Concentrating Solar Thermal Collector and Its Uses
Parallel ATA
Parallel ATA (PATA): legacy parallel storage interface for PCs
Parallel computing
Parallel port
Parallel port: history, design, standards and legacy
Parameter (computer science)
Partition editor
Partition editor — software for creating and managing disk partitions
Pascal
Pascal (programming language)
Passbook (application)
Passbook (Apple mobile application)
Password
Password (authentication credential)
PCLinuxOS
PCLinuxOS: a user-friendly rolling-release Linux distribution
PeaZip
Pebibyte
Pebibyte (PiB): the binary data size unit
Pedal
Pedal (foot-operated control)
Pen
Pen: history, types, components, uses, and cultural significance
Comprehensive overview of pens: origins, major types (reed, quill, dip, fountain, ballpoint, stylus), key parts, typical uses in writing and art, and how pens shaped communication
Pendulum clock
Penetrometer
Penetrometer: instrument for measuring material resistance
A penetrometer is an instrument that measures the resistance of a material—commonly soil, pavement or fruit—to penetration. It is used in geotechnics, agriculture and planetary exp
Pentium
Pentium — Intel x86 microprocessor brand and product family