ADC	Analog-to-Digital Converter
APC	Angled Physical Contact (Fiber Connector Type)
CMM	Coordinate Measuring Machine
DIOT	Distributed I/O Tier
ECDL	External Cavity Diode Laser
EMC	Electromagnetic Compatibility
FCC	Future Circular Collider
FEC	Front-End Computer
FESA	Front-End System Architecture
FFT	Fast Fourier Transform
FRAS	Full Remote Alignment System
FSI	Frequency Scanning (or Sweeping) Interferometry
FT-FSI	Fourier Transform-based Frequency Sweeping Interferometry
GPU	Graphics Processing Unit
HL-LHC	High-Luminosity Large Hadron Collider
HLN	Hydrostatic Leveling Network
HLS	Hydrostatic Leveling Sensor
LHC	Large Hadron Collider
MS/s	Mega Samples per Second
NA	Numerical Aperture
PC	Physical Contact (Fiber Connector Type)
PCB	Printed Circuit Board
SMF	Single-Mode Fiber
SNR	Signal-to-Noise Ratio
SMR	Sphere Mounter Reflector
TID	Total Ionizing Dose
UHNA	Ultra-High Numerical Aperture
UPC	Ultra Physical Contact (Fiber Connector Type)
WPS	Wire Position Sensor