Unemo, UN, unfertilized egg of Ascaris lumbricoides, Unnamed rvalue references are rvalues., Unbalanced Mach-Zehnder interferometer, uncorrected random vibration excitations, unreasonably obstruct or raise obstacles, Unmatched chemical and solvent resistance, unconstrained phase-only matched filter, unconsolidated sand-stone oil reservoir, Unterminated string or character constant, Uncorrelated Linear Discriminant Analysis