Parallelism
Parallelism may refer to:

Angle of parallelism, in hyperbolic geometry, the angle at one vertex of a right hyperbolic triangle that has two hyperparallel sides
Axial parallelism, a type of motion characteristic of a gyroscope and astronomical bodies
Conscious parallelism or also tacit parallelism, price-fixing between competitors that occurs without any communication between the parties
Parallel computing, the simultaneous execution on multiple processors of different parts of a program
In the analysis of parallel algorithms, the maximum possible speedup of a computation
Parallel evolution, the independent emergence of a similar trait in different unrelated species
Parallel (geometry), the property of parallel lines
Parallelism (grammar), a balance of two or more similar words, phrases, or clauses
Parallelism (rhetoric), the chief rhetorical device of Biblical poetry in Hebrew
Psychophysical parallelism, the theory that the conscious and nervous processes vary concomitantly
Parallel harmony/doubling, or harmonic parallelism, in music

See also
Parallel (disambiguation)