There are multiple definitions:

1. Karhunen-Loève(English)

   • AIC, KLT

2. Kullback-Leibler(English)

   • an asymmetric divergence measure
   • GAN
   • https://doi.org…23519-5.00001-4

3. Kellgren Lawrence(English)

   • grading is a standard (and the most common) method for assessing radiographic hand osteoarthritis
   • CMC, DIP, OA, AUSCAN
   • Medical imaging, Skeleton and bone (formation), Rheumatology, Scoring systems/scales
   • https://doi.org…oca.2007.01.012