Discrete element methods are relatively computationally intensive, which limits either the length of a simulation or the number of particles.

* DEMpack Discrete / finite element simulation software in 2D and 3D, user interface based on GiD.

* Discrete element method

* Discrete device, an electronic component with just one circuit element, either passive or active, other than an integrated circuit

Approximations of the Laplacian, obtained by the finite difference method or by the finite element method can also be called Discrete Laplacians.

The 1st, 2nd and 3rd International Conferences on Discrete Element Methods have been a common point for researchers to publish advances in the method and its applications.

Discrete Multi-Tone ( DMT ), the most widely used modulation method, separates the ADSL signal into 255 carriers ( bins ) centred on multiples of 4. 3125 kHz.

* Discrete multitone modulation, an ADSL modulation method

* Discrete Dipole Approximation, method for computing scattering of radiation by particles of arbitrary shape.

* Discrete optimized protein energy, a method of assessing homology models in protein structure prediction

Discrete mathematics is the study of mathematical structures that are fundamentally discrete rather than continuous.

Discrete variables can take on either a finite or at most a countably infinite set of discrete values.

Discrete time signal processing is for sampled signals that are considered as defined only at discrete points in time, and as such are quantized in time, but not in magnitude.

A widely used transform in this regard is the Discrete Cosine Transform ( DCT ), developed by in 1974 by N. Ahmed, T. Natarajan and K. R. Rao ; see Reference 1 in discrete cosine transform.

In 1971, JVC introduced the first discrete system for four channel quadraphonic sound on vinyl records-CD-4 ( Compatible Discrete Four Channel ) or Quadradisc, as it was called by the Radio Corporation of America ( RCA ) in the United States.

* Discrete Fourier transform ( DFT ), occasionally called the finite Fourier transform, the Fourier transform of a discrete periodic sequence ( yielding discrete periodic frequencies ), which can also be thought of as the DTFT of a finite-length sequence evaluated at discrete frequencies

* Discrete Hartley transform, a Fourier-related transform of discrete, periodic data similar to the discrete Fourier transform

* Discrete group, a group with the discrete topology

Compatible Discrete 4 ( CD-4 ) or Quadradisc ( not to be confused with compact disc ) was introduced in May 1972 as a discrete quadraphonic system created by JVC and RCA.

) Discrete variables referring to more than two possible choices are typically coded using dummy variables ( or indicator variables ), i. e. separate explanatory variables taking the value 0 or 1 are created for each possible value of the discrete variable, with a 1 meaning " variable does have the given value " and a 0 meaning " variable does not have the given value ".

* Survey Analysis Tool based on A. Berkopec, HyperQuick algorithm for discrete hypergeometric distribution, Journal of Discrete Algorithms, Elsevier, 2006.

Discrete mathematics is the study of mathematical structures that are fundamentally discrete rather than continuous.

Discrete geometry and combinatorial geometry are branches of geometry that study combinatorial properties and constructive methods of discrete geometric objects.

Discrete geometry has large overlap with convex geometry and computational geometry, and is closely related to subjects such as finite geometry, combinatorial optimization, digital geometry, discrete differential geometry, geometric graph theory, toric geometry, and combinatorial topology.

* Virtual Laboratory Environment is an open source program written in C ++ based on the discrete event formalism DEVS ( Discrete Event System Specification )

* Discrete Fourier Series, the discrete version of Fourier series

The discrete version of the transform, the Discrete Hartley transform, was introduced by R. N. Bracewell in 1983.

Discrete geometry or combinatorial geometry may be loosely defined as study of geometrical objects and properties that are discrete or combinatorial, either by their nature or by their representation ; the study that does not essentially rely on the notion of continuity.

Discrete translational symmetry is invariance under discrete translation.

* Discrete cosine transform, a Fourier-related transform similar to the discrete Fourier transform ( DFT ), but using only real numbers.

Discrete mathematics, also called finite mathematics, is the study of mathematical structures that are fundamentally discrete, in the sense of not supporting or requiring the notion of continuity.

** AnyLogic multi-method simulation tool, which supports System dynamics, Discrete event simulation, Agent-based modeling

* From System Dynamics and Discrete Event to Practical Agent-Based Modeling: Reasons, Techniques, Tools Compares the three major methods in simulation modeling

* Discrete wavelet transform, a mathematical procedure in numerical analysis and functional analysis

* Discrete optimization methods – the search space is quantized, and then image matching is addressed through label assignment at every pixel, such that the corresponding deformation minimizes the distance between the source and the target image.

# Donald E. Knuth, Selected Papers on Discrete Mathematics ( Stanford, California: Center for the Study of Language and Information — CSLI Lecture Notes, no.

See Discrete Fourier transform for much more information, including:

Information Theory: Coding Theorems for Discrete Memoryless Systems Akademiai Kiado: 2nd edition, 1997.

Discrete probability distribution for the sum of two dice.

Discrete aurorae often display magnetic field lines or curtain-like structures, and can change within seconds or glow unchanging for hours, most often in fluorescent green.

* Williams, J. R. and Pentland, A. P., " Superquadric and Modal Dynamics for Discrete Elements in Concurrent Design ," National Science Foundation Sponsored 1st U. S. Conference of Discrete Element Methods, Golden, CO, October 19 – 20, 1989.

* Fradkin, Dmitriy ; and Muchnik, Ilya ; Support Vector Machines for Classification in Abello, J .; and Carmode, G. ( Eds ); Discrete Methods in Epidemiology, DIMACS Series in Discrete Mathematics and Theoretical Computer Science, volume 70, pp. 13 – 20, 2006..

* Fast Fourier transform ( FFT ), a fast algorithm for computing a Discrete Fourier transform

The ORDVAC or Ordnance Discrete Variable Automatic Computer, an early computer built by the University of Illinois for the Ballistics Research Laboratory at Aberdeen Proving Ground, was based on the IAS architecture developed by John von Neumann, which came to be known as the von Neumann architecture.

* Discrete particle or quantum in physics, for example in quantum theory

Other work, like Discrete Packets and Police Radio use the web as a medium for exploring wider cultural concerns.

* R. Tolimieri, M. An, and C. Lu, " Algorithms for Discrete Fourier Transform and Convolution ," Springer-Verlag, 2nd ed., 1997.

* Jonathan Arbib & John Dwyer, Discrete Mathematics for Cryptography, 1st Edition ISBN 978-1-907934-01-8.

* John Dwyer & Suzy Jagger, Discrete Mathematics for Business & Computing, 1st Edition 2010 ISBN 978-1-907934-00-1.

Oppen had begun working on poems for what was to be his first book, Discrete Series, a seminal work in early Objectivist history.

* Prime Factor Algorithm, a fast algorithm for computing the Discrete Fourier transform

Discrete circuits of hundreds or thousands of transistors quickly expand to occupy hundreds or thousands of square centimeters of circuit board area, and for very high-speed circuits such as those used in modern digital computers, the distance between transistors ( and the minimum capacitance of the connections between them ) also makes the desired speeds grossly unattainable, so that if these designs cannot be built as integrated circuits, then they simply cannot be built.