Progression

Progression may refer to:

In mathematics:
 * Arithmetic progression, sequence of numbers such that the difference of any two successive members of the sequence is a constant
 * Geometric progression, sequence of numbers such that the quotient of any two successive members of the sequence is a constant
 * Harmonic progression (mathematics), sequence of numbers such that their reciprocals form an arithmetic progression

In music:
 * Chord progression, series of chords played in order
 * Backdoor progression, the cadential chord progression from iv7 to I, or flat-VII7 to I in jazz music theory
 * Omnibus progression, sequence of chords which effectively divides the octave into 4 equal parts
 * Ragtime progression, chord progression typical of ragtime music and parlour music genres
 * Progression, music software for guitarists
 * Progression, Markus Schulz's second Artist Album, released in 2007

In other fields:
 * Age progression, the process of modifying a photograph of a person to represent the effect of aging on their appearance
 * Cisternal progression, theory of protein transport through the Golgi apparatus inside a cell
 * Color progression, ranges of color whose values transition smoothly through a hue, saturation, luminance, or any combination of the three
 * Horizontal progression, the gradual movement from left to right during writing a line of text in Western handwriting
 * A progressive tax is a tax by which the tax rate increases as the taxable amount increases
 * Semantic progression, evolution of word usage
 * Educational progression, an individual's movement through stages of education and/or training
 * Progress tracking in video games
 * Astrological progression, used in Horoscopic astrology to forecast future trends and developments.