There are multiple definitions:

1. amplitude-shift keying(English)

   • AGC, FSK, LNA, PLL
   • Signal analysis

2. Association of Systematic Kinesiology(English)

   • Rehabilitation, Physical therapy

3. Adherence Starts with Knowledge(English)

   • ACT, ACT-FM, ACTKQ, ACTION, AET, ASK, AI, B&N, CTRU, DIVA, ER+, FACT-ES, GAD-7, HFRDIS, HCPC, MAF, NHS, NRES, PHQ-9, RCT, RUSAE, SERM, VQ, WSAS
   • Guidelines
   • https://doi.org…814-022-00985-6

4. ankylosing spondylitis kyphosis(English)

   • LCA, ODI, QOL, SVA, TL, VAS
   • Spine (or spinal cord), Disability, Injury
   • https://doi.org…-1892.202307021
   • https://pubmed.…h.gov/26455147/