I (disambiguation)

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I is the ninth letter of the alphabet. It can also refer to:

• I (pronoun), the first-person singular pronoun

[edit] Astronomy

• i, the symbol for orbital inclination
• I, in the Yerkes spectral classification scheme the symbol for supergiants

[edit] Chemistry

• I, the symbol for iodine on the periodic table
• I, the symbol for isoleucine in biochemistry

[edit] Economics

• i, the symbol for the interest rate
• I, the symbol for investment

[edit] Genetics

• Haplogroup I (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup
• Haplogroup I (Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup

[edit] Mathematics

• 1 (number) in Roman numerals
• i, the imaginary unit for which i² = -1 - See also: Imaginary number
• I (or I_n), an identity matrix of indeterminate size (or of size n)
• i, an index variable in a matrix
• I_x(a,b), the regularized incomplete beta function (of a variable x and parameters a,b)
• I, the closed unit interval which contains all real numbers from 0 to 1 inclusive
• (pronounced "i-hat"), the unit vector along the x-axis in Cartesian coordinates

[edit] Music

• I, a diatonic function in tonal music theory
• I (album), the debut album of Kurt Nilsen
• I (band), a band formed by members of Immortal, Enslaved, Gorgoroth, and Sahg
• I (Cilvaringz album), the debut album of Wu-Tang Clan affiliate producer Cilvaringz
• I (EP), an EP by Meshuggah
• I (Magnetic Fields album), an album by the Magnetic Fields
• "I", a song on Dehumanizer, an album by Black Sabbath
• "I", a song on Coal Chamber, an album by Coal Chamber
• "I", a song on Music from "The Elder", an album by KISS

[edit] Physics

• I and i, symbols for electric current signals in electronic engineering
• I, the moment of inertia

[edit] Computer programming

• i, a common generic index variable often used for looping constructs
• <i>, an HTML element for marking italic type
• .i, the common filename extension for a file that contains the output from a preprocessor.

[edit] Radio and television

• i (TV network), the former name of ION Television
• I band, the range of radio frequencies from 8 GHz to 10 GHz in the electromagnetic spectrum
• I, the ITU prefix allocated to Italy in radio communication
• I, in QAM modulation schemes, the in-phase communications channel
• I, in the YIQ colorspace commonly used with the NTSC television encoding scheme, the color-difference channel which is in-phase with the subcarrier

[edit] Miscellenea

• I (kana), one of the Japanese kana that each represent one mora
• I, the symbol for Italy in the list of international license plate codes
• /i/, /ɨ/ and /ɪ/, in the International Phonetic Alphabet, the three forms of the letter I
• Mitsubishi i, a Japanese kei car
• I, a character in Adventure into Fear who acted as a guide for Morbius, the Living Vampire
• Lowercase i prefix, a common prefix used by Internet and electronic companies
• IBM i is a computer operating system.

This disambiguation page lists articles associated with the same Latin letter. If an internal link led you here, you may wish to change the link to point directly to the intended article.