CH	Cultural Heritage
TH	Technological Heritage; Tech Heritage
MRI	Magnetic Resonance Imaging
MRT	Magnetic Resonance Tomography
PET	Positron Emission Tomography
CT	Computed Tomography
CV	Computer Vision
SGM	Semi-global Matching
tSGM	Tube-based Semi-global Matching
SURE	Surface Reconstruction (from imagery)
DIM	Dense Image Matching
MVS	Multi-view Stereo
AR	Augmented Reality
VR	Virtual Reality
OA	Open Access
OS	Open Source
CSG	Constructive Solid Geometry
ICP	Iterative Closest Point (algorithm)
CP	Control Point
2D	Two-dimensional array of numbers
2.5D	Three-dimensional points meshed by 2D topology (triangles, grids)
3D	Three-dimensional array—3D points meshed by 3D topology
SfM	Structure-from-Motion, Bundle Block Adjustment
PCL	Open-source library of algorithms for point cloud processing
Open3D	Open-source library dealing with 3D data
V(O)	Set of 3D voxels—a voxel cloud
P(O)	Set of 3D points—a point cloud
GSD; OSD	Ground Sampling Distance; Object Sampling Distance
P rate gyro	Gyroscope measuring angular rate along input axis
I rate gyro	Gyroscope measuring integrated angular rate along input axis
LGW	Luftfahrtgerätewerk Hakenfelde (Berlin)
FoV	Field-of-View
CC	Creative Commons
CC BY-SA	License to share OA contents with other users who respect copyright
Goobi	Open-source web-based software
DT	Digital Twin
FBP	Filtered Back Projection
MLEM	Maximum-Likelihood Expectation-Maximization
CNN	Convolutional Neural Network
ReLU	Rectified Linear Unit (of neural networks)
GPU	Graphics Processing Unit
DSLR	Digital Single Lens Reflex (camera)
MEMS	Micro-Electro-Mechanical Systems
LKu4	Directional Gyro of Type “Siemens LKu4”
LN3	Inertial Platform of Type “Litton LN-3”
G200	Type of the Gyroscopes of the “Litton LN-3”
glTF	Graphics Language Transmission Format, standard file format for 3D models
obj	Open file format for 3D data storage and handling
Draco	Open-source library for compressing/decompressing 3D meshes
CIDOC	International Committee for Documentation
CIDOC CRM	CIDOC Conceptual Reference Model