In most languages where it is employed, this letter represents the sound /k/ (with or without aspiration) or some similar sound.

In the United Kingdom under the old system (before 2001), a licence plate that begins with "K" for example "K123 XYZ" would correspond to a vehicle registered between August 1, 1992, and July 31, 1993. Again under the old system, a licence plate that ends with "K" for example "ABC 123K" would correspond to a vehicle that was registered between August 1, 1971, and July 31, 1972.k, eleventh letter of the alphabet. It corresponds to the Semitic kaph and the Greek kappa (Κ). It has changed its shape less perhaps than any other letter in the history of the alphabet.

K" Oxford English Dictionary, 2nd edition (1989); Merriam-Webster's Third New International Dictionary of the English Language, Unabridged (1993); "kay," op. cit. The letter ⟨k⟩ is silent at the start of an English word when it comes before the letter ⟨n⟩, as in the words knight, knife, knot, know, and knee.

a b Anderson, Deborah (2020-12-07). "L2/21-021: Reference doc numbers for L2/20-266R "Consolidated code chart of proposed phonetic characters" and IPA etc. code point and name changes" (PDF). Sihler, Andrew L. (1995). New Comparative Grammar of Greek and Latin (illustrated ed.). New York: Oxford University Press. p. 21. ISBN 0-19-508345-8. Archived from the original on 2016-11-09 . Retrieved 2016-10-18.

In the International System of Units (SI), the SI prefix for one thousand is kilo-, officially abbreviated as k: for example, prefixed to metre/ meter or its abbreviation m, kilometre or km signifies a thousand metres. As such, people occasionally represent numbers in a non-standard notation by replacing the last three zeros of the general numeral with K, as in 30K for 30,000. Everson, Michael; Baker, Peter; Emiliano, António; Grammel, Florian; Haugen, Odd Einar; Luft, Diana; Pedro, Susana; Schumacher, Gerd; Stötzner, Andreas (2006-01-30). "L2/06-027: Proposal to add Medievalist characters to the UCS" (PDF). Archived (PDF) from the original on 2018-09-19 . Retrieved 2018-03-24.

Everson, Michael; Jacquerye, Denis; Lilley, Chris (2012-07-26). "L2/12-270: Proposal for the addition of ten Latin characters to the UCS" (PDF). Archived (PDF) from the original on 2019-03-30 . Retrieved 2018-03-24.