K-line

K-line may refer to:

Chemistry[edit]

K-line (spectrometry), one of two features in spectroscopy:
- Calcium K line, a Fraunhofer spectral line from ionised calcium
- K-line (x-ray), an x-ray peak in astronomical spectrometry
K line, a term used in Internal conversion electron spectroscopy

Computing[edit]

K-line (artificial intelligence) (Knowledge-line), a mental agent in artificial intelligence
K-line (IRC), a server ban in IRC

Finance[edit]

Candlestick chart, or K-line, a style of financial chart used to describe price movements of a security, derivative, or currency

Sports[edit]

K line, the line marking the calculation point in ski jumping

Transportation[edit]

K (Broadway Brooklyn Local), earlier KK, discontinued in 1976
K (Eighth Avenue Local), a defunct train service on the New York City Subway, which was known as the AA until 1985
K Ingleside, a service of the San Francisco Municipal Railway sometimes called the K Line
K Line (Los Angeles Metro), a light rail line in Los Angeles County, California
K (Los Angeles Railway), defunct streetcar line in Los Angeles, California
K Line, a Japanese shipping company
K-Line, a model railway locomotive company
K-Line bus operator in Yorkshire, England since rebranded as Tiger Blue
K-Line, part of the ISO 9141 on-board diagnostics vehicle network interface standard

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