Technology and the built world

Multiprotocol Label Switching

Multiprotocol Label Switching (MPLS), also known as tag switching, is a packet-forwarding technique standardized by the IETF in 2001 that routes packets using short labels instead of long address lookups.

Multirole combat aircraft

A multirole combat aircraft, also called a multirole fighter, is a combat aircraft able to perform both air-to-air and air-to-surface missions, such as ISR and strike.

Multiscale modeling and simulation

Multiscale modeling and simulation is a computational approach that couples models at different scales, such as QM/MM and the quasicontinuum method, balancing accuracy and efficiency.

Multiscale topology optimization

Multiscale topology optimization is a computational structural design method that optimizes material layout at two length scales at once, producing a structure and its functionally graded microstructure.

Multispectral imaging

Multispectral imaging records a scene in a small number of discrete wavelength bands, between RGB and hyperspectral imaging, used in satellite remote sensing, agriculture, and cultural heritage imaging.

Oct 22, 2026

Multistable mechanical metamaterials

Multistable mechanical metamaterials are engineered structures with two or more stable configurations that switch reversibly under stimuli, enabling vibration isolation, energy absorption, and soft robotics.

Multistage detection

Multistage detection is a signal-detection method in digital communications in which the receiver estimates symbols in several successive passes, each stage using the previous one's decisions to cancel interference.

Multistage multiuser detector

A multistage multiuser detector is a CDMA receiver that removes multiple-access interference through successive stages, each canceling other users' signals; it was introduced by Varanasi and Aazhang in 1990.

Multistage rocket

A multistage rocket, or step rocket, is a launch vehicle built in two or more stages, each with its own engines and propellant, whose spent stages are dropped in flight.

Multistakeholder model of internet governance

The multistakeholder model of internet governance is a paradigm in which governments, the private sector, and civil society share decision-making, defined by the 2005 WSIS Tunis Agenda.

Multistatic radar

Multistatic radar is a radar technique in which several spatially separated receivers, with one or more transmitters, observe a target to measure position, velocity, and wind or ocean-current fields.

Multitarn

Multitarn (German: Multitarndruck) is a six-color universal camouflage pattern of the German Bundeswehr, worn by special forces since about 2016 and replacing Flecktarn from 2026.

Multitask learning

Multitask learning (MTL) is a machine learning method that trains one model on several related tasks simultaneously, sharing a common representation that improves generalization on each task.

Oct 22, 2026

Multitask neural networks for QSAR

Multitask neural networks for QSAR predict the biological activities of chemical compounds against several targets at once, using one shared model instead of a separate QSAR model per endpoint.

Multitenancy

Multitenancy is a software architecture in which a single instance of an application serves multiple customer organizations, called tenants, lowering costs through shared infrastructure; it is how Software-as-a-Service is typically delivered.

Multithreading (computer architecture)

Multithreading in computer architecture is a set of hardware techniques that let one processor core hold and run several hardware threads at once, filling otherwise idle execution slots.

Multitier architecture

Multitier architecture, also called n-tier or three-tier architecture, is a software design pattern separating an application into presentation, application, and data tiers, popular since the 1990s.

Multitrack recording

Multitrack recording, also called multichannel recording, records separate audio signals on parallel tracks of one medium so each part can be modified, and mixed independently later.

Multiuser detection

Multiuser detection is a signal processing technique that recovers the data streams of multiple simultaneous users from a shared communication channel by treating their signals jointly.

Multivariate pattern analysis

Multivariate pattern analysis (MVPA) is a machine learning method that classifies mental states and stimuli from patterns of brain activity across many voxels, introduced by James V. Haxby in 2001.

Multiverse (company)

Multiverse, formerly WhiteHat, is a British technology and education company founded in London in 2016 by Euan Blair that delivers apprenticeships and workplace training in data, AI, and technology skills.

Multiversion concurrency control

Multiversion concurrency control (MVCC) is a database concurrency control method in which each write creates a new version, so readers see a consistent snapshot and never block writers.

Multivibrator

A multivibrator is an electronic circuit of two inverting amplifier stages with positive feedback, producing non-sinusoidal waveforms; it takes astable, monostable, and bistable forms, the last being the flip-flop.

Multiview clustering

Multiview clustering (MVC) is an unsupervised machine learning method that groups data objects by combining several views, or representations, of the same objects, seeking clusterings consistent across views.

Multiway switching

Multiway switching, known in the US as a three-way switch circuit, controls a single light from two or more locations, as in hallways and stairways.

MultiWii

MultiWii is open-source autopilot firmware for multirotor model aircraft, developed by radio-control hobbyists to run on Arduino boards, with GPS position hold and return-to-home support.

MultiWOZ

MultiWOZ (Multi-Domain Wizard-of-Oz) is a fully labeled dataset of about 10,000 human-written task-oriented dialogues, released in 2018 and now a leading benchmark for dialogue state tracking.

Multnomah (steamboat)

Multnomah was a side-wheel steamboat on Oregon's Willamette and Columbia rivers, launched at Canemah in 1851 and the first steamer to ascend the Willamette to Corvallis.

Mumbai Central railway station

Mumbai Central railway station, formerly Bombay Central, is a major terminal of Western Railway in Mumbai, opened in 1930 and serving long-distance, intercity, and suburban trains.