There are multiple definitions:

1. discrete wavelet transform(English)

   • CCC, CWT, DCT, JPEG, PCT, PWT, SWT
   • Wavelets

2. dyadic wavelet transform(English)

   • WT
   • Wavelets

3. drinking-water-treatment(English)

   • may refer to a facility
   • BPA, CBZ, DWS, EOC, IDMS, MOE, RE, GFB
   • Environment, Pollution and health, Water
   • https://doi.org…env.2004.03.015