ALS	Amyotrophic Lateral Sclerosis
ASRDs	Application-Specific Reference Databases
BAD	Bile Acid Diarrhea
CBPC	Carbon Black Polymer Composite
CC	Colon Cancer
CD	Celiac Disease
CE	Capillary Electrophoresis
CGD	Chronic Gastrointestinal Disease
CNF	Carbon Nanofiber
CP	Conducting Polymer
CRC	Colorectal Cancer
CRD	Crohn’s Disease
EAD	Electronic Aroma Detection
EC	Electrochemical
ED	Ethyl Dodecanoate (biomarker)
E-nose	Electronic-nose
EM	Endometriosis
FAIMS	Field Asymmetric Ion Mobility Spectroscopy
FID	Flame Ionization Detector
GC-MS	Gas Chromatography-Mass Spectrometry
GC-TOF-MS	Gas Chromatography-Time-Of-Flight-Mass Spectrometry
GC/O	GC-Olfactometry
GI	Gastrointestinal
GIRMs	Gastrointestinal Resident Microbes
GNP	Gold Nanoparticle
HIA	Hydroxylamine-based Indole Assay
HNC	Head and Neck Cancer
HS-SPME	Headspace Solid Phase Microextraction
ID	Infectious Diarrhea
IBD	Inflammatory Bowel Disease
IBS	Irritable Bowel Syndrome
IMR-MS	Ion Molecule Reaction-Mass Spectrometry
IR	Infrared
LDA	Linear Discriminant Analysis
LD-PCA	Linear Discriminant Principle Component Analyses
LOS	Late-Onset Sepsis
MIB	2-methylisoborneol (VOC-metabolite)
MOS	Metal Oxide Semiconductors
MS	Mass Spectrometry
NAFLD	Nonalcoholic Fatty Liver Disease
NDIR	Non-Dispersive Infra-red (optical devices)
NEC	Necrotizing Enterocolitis
NMR	Nuclear Magnetic Resonance
NVOMs	Non-Volatile Organic Metabolites
PCA	Principal Component Analysis
PCR	Polymerase Chain Reaction
PID	Photo-Ionization Detector
POCT	Point-Of-Care Testing
PTR-MS	Proton Transfer Reaction Mass Spectrometry
QA/QC	Quality Assurance/Quality Control
QCM	Quartz Crystal Microbalance
RCC	Renal Cell Carcinoma
SAW	Surface Acoustic Wave
SESI-MS	Secondary Electrospray Ionization-Mass Spectrometry
SIFT-MS	Selected Ion Flow Tube-Mass Spectrometry
SPME	Solid Phase Microextraction
TB	Tuberculosis
TCA	Tricarboxylic Acid (pathway)
UC	Ulcerative Colitis
UPLC-MS	Ultra-Performance Liquid Chromatography-Mass Spectrometry
VE	Viral Enteritis
VOCs	Volatile Organic Compounds
VOMs	Volatile Organic Metabolites