Technologies
Each entry explains a technology, the problems it solves and its connections.
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Reinforced concrete
Developed from reinforced products into structural systems in the mid-to-late 19th century · matureIndustry · MaterialsConcrete incorporates reinforcing elements such as steel bars, which work together with it to improve tensile and flexural performance.
Limestone calcined clay cement
2009–2012: research on ternary systems; international technical validation began in 2014 · emergingIndustry · MaterialsCombines clinker, calcined clay, limestone and gypsum, using synergistic hydration to reduce the clinker content of cement.
Rifling
Late 15th century: the technology was already present in German regions · matureIndustry · MilitaryRifling inside the barrel spins a projectile to improve its stability in flight; it is a separate aspect of firearm technology from the ignition system.
Cement rotary kiln firing
Gradually adopted in industrial cement production in the late 19th century · matureEnergy · Industry · MaterialsA slowly rotating, inclined kiln moves and heats material, enabling continuous production of cement clinker.
Lime burning
Archaeological evidence of lime burning dates to around 10000 BCE · matureEnergy · Industry · MaterialsControlled heating of calcareous rock produces reactive lime, transforming natural rock into a workable raw material for binders.
Milling
Early 19th century: specialized cutting machinery developed by Hall and others · matureIndustryA machining method that removes material with a rotating cutter, contributing to consistency of mechanical parts and the machining of complex surfaces.
Interchangeable-parts manufacture
Developed in the early 19th century; Hall's project of 1819–1822 is a verified example · matureIndustryUses dimensional consistency and process control to make parts of the same type interchangeable, reducing the burden of individual fitting and maintenance.
Pozzolanic binder technology
Hydraulic applications combining lime and volcanic ash existed by at least the 1st century BCE · matureIndustry · MaterialsUses reactions between reactive siliceous and aluminous materials and calcium-bearing systems to form binding products; both ancient natural volcanic ash and some modern activated clays can participate in this mechanism.
Binary numeral system
Developed in the 17th century; used in electronic computing in the 20th century · matureIndustry · InformationA numeral system that uses only 0 and 1 to represent values and states, providing a common representation for reliable digital switching and computer encoding.
Boolean algebra
1847–1937 · matureIndustry · InformationA mathematical system that represents truth values and logical operations with algebraic rules, providing a formal method for designing combinations of logic gates and switching circuits.
Central processing unit
1945–1951 · matureIndustry · InformationThe core computer component that executes instructions, performs arithmetic and logical operations, and coordinates registers, memory, and input/output.
Charcoal production
Known in antiquity; became a metallurgical fuel before and around modern industrialization · matureEnergy · Industry · MaterialsHeating wood with no oxygen or limited oxygen to obtain a solid fuel with a higher fixed-carbon content and better suitability for high-temperature combustion.
CMOS
1963–1975 · matureIndustry · InformationA circuit technology that uses complementary p-channel and n-channel MOSFETs to form logic networks with almost no steady-state DC power consumption.
Cement
Hydraulic binders existed in ancient Rome; modern industrial cement developed in the 18th–19th centuries · matureIndustry · MaterialsA binder that reacts with water to form hardened products, joining particles or components into a whole; Portland cement is one type.
Digital logic circuits
1937–1948 · matureIndustry · InformationA system of circuits that processes information using discrete signals and logic gates, implementing binary representation and Boolean rules as hardware that can be combined.
Electric generators
Developed during the 19th century from magneto-electric machines into practical self-excited generators · matureEnergy · IndustryA device that converts rotational mechanical work into electrical energy through electromagnetic induction.
Electric power systems and grids
Central power stations appeared in 1882; scalable AC transmission systems took shape in the late 19th century · matureEnergy · Industry · Information · TransportA system for supplying and consuming electrical energy that combines generation, voltage transformation, transmission, distribution, protection, and dispatch.
Concrete
Mature applications existed in ancient Rome; modern cement concrete developed widely in the 19th century · matureIndustry · MaterialsA composite material made by mixing and shaping a binder, fine and coarse aggregates, and water, then allowing it to harden for use in structures.
Portland cement
1824: Portland cement patent; key advances in clinker production in the 1840s · matureIndustry · MaterialsA hydraulic binder made by firing a prepared mix of calcareous and siliceous/aluminous raw materials into silicate clinker, then grinding it with gypsum and other materials.
Lime mortar
Used in antiquity; the sources in this review confirm established lime-binding practices in ancient Rome · matureIndustry · MaterialsA workable masonry or repair material made from lime, sand, and water; traditional air-hardening formulations harden mainly through carbonation.
Integrated circuits
1958–1961 · matureIndustry · InformationAn electronic circuit with multiple transistors, resistors, capacitors, and interconnections manufactured on a single semiconductor substrate.
Junction transistor
1948–1952 · matureIndustry · InformationA three-terminal bipolar transistor structure that uses p-n junctions and carrier injection through the base region for amplification and switching.
Large-scale integration
1967–1972 · matureIndustry · InformationA stage of technology and scale of design that integrates hundreds to thousands of transistors and their interconnections into a single integrated circuit.
Magnetic-core memory
1949–1955 · matureIndustry · InformationRandom-access memory that stores binary bits in tiny magnetic cores whose magnetization can be reversed, using wire windings for selection, reading, and writing.
Mercury delay-line memory
1947–1951 · matureIndustry · InformationSerial memory that transmits pulses as sound waves through mercury-filled tubes and recirculates them for reading and writing.
Metal smelting
Early metal smelting appeared from around 5000 BCE; large-scale furnace workshops emerged in the Bronze Age · matureEnergy · Industry · MaterialsExtracts metals from ores using controlled high temperatures and a reducing environment, then produces usable materials through melting, casting, or forging.
Microprocessor
1971–1972 · matureIndustry · InformationA processor device that integrates the main functions of a central processing unit onto a single chip that can be packaged as one device.
Microprogramming
1951–1960 · matureIndustry · InformationA method of implementing machine-instruction control logic through sequences of microinstructions held in a control store.
MOS integrated circuit
1964–1970 · matureIndustry · InformationAn integrated-circuit approach that uses MOSFETs as its basic devices to implement logic or memory functions on a single chip.
MOSFET
1959–1960 · matureIndustry · InformationA field-effect transistor that uses the electric field from an insulated gate to control conduction in a semiconductor channel, serving as the basic switching device in MOS integrated circuits.
Semiconductor photolithography
1955–1960 · matureIndustry · InformationUses photomasks and photosensitive materials to transfer circuit patterns onto wafer surfaces, enabling repeatable manufacture of semiconductor devices.
Photovoltaic cell
1839: discovery of the photovoltaic effect; 1954: silicon photovoltaic cells became practical for power generation · matureEnergy · Industry · MaterialsA device that uses the photovoltaic effect in semiconductors to convert solar radiation directly into direct-current electricity.
Planar process
1959–1961 · matureIndustry · InformationA semiconductor fabrication process that retains a protective silicon dioxide layer on the silicon surface and uses masks to form devices and interconnections.
Point-contact transistor
1947–1948 · matureIndustry · InformationAn early three-terminal solid-state device for amplification and switching that uses two closely spaced metal contacts to control current in a semiconductor.
Read-only memory
1965–1971 · matureIndustry · InformationNonvolatile semiconductor memory whose contents are set during manufacturing or programming and primarily read during operation.
Semiconductor memory
1960–1971 · matureIndustry · InformationAn umbrella term for memory that integrates storage cells, decoding, and read/write circuits on a semiconductor chip, including approaches such as RAM and ROM.
Silicon-gate process
1968–1971 · matureIndustry · InformationA manufacturing process that uses polysilicon MOS gates and self-aligned structures to improve device speed, dimensions, and interconnection capabilities.
Silicon transistor
1954–1961 · matureIndustry · InformationA transistor made from high-purity silicon with controlled doping, improving on germanium devices in temperature stability, leakage current and suitability for mass production.
Steam engines
Improved in the 18th century and adopted in factories, mines, and transport · replacedEnergy · Industry · TransportA heat engine that converts the pressure of steam produced by a boiler into reciprocating or rotary mechanical work.
Stored-program computer
1948–1951 · matureIndustry · InformationA general-purpose computer architecture that stores both instructions and data in readable and writable memory and executes instruction sequences automatically.
Transistor-transistor logic
1961–1964 · matureIndustry · InformationAn integrated-circuit logic family in which bipolar transistors perform both input logic and output driving.
Transistorized computer
1953–1961 · matureIndustry · InformationA general-purpose computer system that uses discrete transistors in place of its principal vacuum-tube logic and amplifiers.
Vacuum tube
1904–1906 · matureIndustry · InformationAn electronic device that uses the movement of electrons in a vacuum for rectification, amplification or switching, and was the main active device in early electronic computers.