Engineering
Articles about engineering disciplines, systems and applied design.
Plotter
Plotter: large-format vector printers and cutting devices
Plumbing
Plywood
Plywood: manufactured wood panels made from cross‑layered veneers
Pneumatics
Pneumatics: Principles, Components, History and Common Uses
Polyethylene
Polyethylene (PE): Properties, Types, Uses, and Environmental Aspects
Potter's wheel
Potter's wheel: history, design, and throwing techniques
Power consumption
Power consumption: meaning, measurement, and practical considerations
Power cut
Power line
Power line: transmission and distribution of electrical energy
Power system harmonics
Power system harmonics: causes, effects and mitigation
Power transmission
Pressurized heavy-water reactor
Pressurized Heavy-Water Reactor (PHWR)
Pressurized water reactor
Pressurized Water Reactor (PWR)
Prime mover (locomotive)
Process
Program specification
Programming language
Programming paradigm
Project management
Propeller
Pulley
Pulley (simple machine)
Pulse jet engine
Pulse jet engine: simple pulsed combustion propulsion
Pyrotechnics
Pyrotechnics: Principles, History, and Applications
Quickdraw
Quickdraw (climbing gear)
Race condition
Race condition (computing and electronic systems)
Radiation hardening
Radiation hardening of electronic systems
Ramjet
Ramjet: a simple high‑speed airbreathing jet propulsion system
Rayon
Refinery
Refinery — Industrial Facilities for Converting Raw Materials into Usable Products
Refractory
Register renaming
Reinforced concrete
Reinforcement learning
Reinforcement learning: concepts, history, and applications
Resistance welding
Resistor
Respirator
Respirators: Types, Applications, and Safety Requirements
Reverse osmosis
Reverse osmosis: principles, components, uses, and limitations
Rheology
Rheology: the science of flow and deformation
Rhine-Main-Danube Canal
Rhine–Main–Danube Canal
Rifling
Rivet
Rivet: a permanent mechanical fastener and its roles in metalwork
Road surface
Road surface (pavement): materials, construction, history and uses
Robotics
Rocket engine
Rocket engine nozzle
Rod (unit)
Rope
Rotor
Rotor: rotating components in machines, engineering and culture