-
505.
Microscopes
Subjects
-
506.
Microscopy
Subjects
Optical instrumentsOptics
-
507.
Microscopy of materials
Subjects
Microscopy
-
508.
Microstructure
Subjects
Constitution of matterMaterials
-
509.
Microwave devices
Subjects
Electric apparatus and appliancesMicrowaves
-
510.
Microwave heating
Subjects
Electric heatingDirect energy conversionDielectrics
-
511.
Microwave spectroscopy
Subjects
Microwaves
-
512.
Microwave transmission lines
Subjects
Electric linesMicrowaves
-
513.
Microwaves
Subjects
Electric wavesElectromagnetic wavesRadio wavesShortwave radio
-
514.
Military topography
Subjects
SurveysCartographyMilitary engineeringMilitary geographyTopography
-
515.
Mine surveying
Subjects
Topography
-
516.
Mirrors
Subjects
Optical instrumentsFurniture
-
517.
Modulation (Electronics)
Subjects
ElectronicsRadio
-
518.
Molecular crystals
Subjects
CrystalsMolecules
-
519.
Molecular dynamics
Subjects
DynamicsPhysics
-
520.
Molecular rotation
Subjects
Molecular dynamics
-
521.
Molecular spectroscopy
Subjects
Spectrum analysis
-
522.
Molecular theory
Subjects
Constitution of matterPhysical and theoretical chemistry
-
523.
Molecules
Subjects
Constitution of matter
-
524.
Moments of inertia
Subjects
Rigid dynamicsMechanics
-
525.
Monomers
Subjects
MoleculesChemical products
-
526.
Months
Subjects
CalendarChronology
-
527.
Mössbauer effect
Subjects
Fluorescence
-
528.
Mössbauer spectroscopy
Subjects
Last updated dated: 21/02/2026