There are multiple definitions:

1. rule-based system(English)

   • QRBS
   • Artificial intelligence, Machine learning
   • https://doi.org…4174(93)90035-5

2. random blood sugar(English)

   • testing of the blood sugar level at any time of the day
   • FBS
   • Diabetes, Clinical chemistry, Pregnancy
   • https://doi.org…cp.JOACP_382_19

3. ribosome binding site(English)

   • a short nucleotide sequence in prokaryotic mRNA transcripts recognized by ribosomes to initiate translation
   • Cas9, CDS, CSP, CRISPRi, gRNA, miRNA, PCR, QS, RBS, TALE
   • Molecular biology, Transcription
   • https://doi.org…OC.2021.3134169