There are multiple definitions:

1. Pediatric Stabilization Unit(English)

   • RVD
   • Pediatrics

2. primary sampling unit(English)

   • selected by stratified multistage random sampling to be nationally representative
   • CHC, NCD, NNMS, PHC
   • Health care
   • https://doi.org…2942-017-0098-4

3. public sector undertaking(English)

   • GHPU
   • Psychiatry
   • https://doi.org…ychiatry_435_17

4. problematic smartphone use(English)

   • university students have serious smartphone addiction problems, which are associated with depressive, anxiety, and insomnia symptoms
   • ASD, IA, MPPUS, MPU, PG, PIU, PSMU
   • Social media, Anxiety/fear, Depression, Sleep medicine
   • https://doi.org…ubh.2022.881074