SMMU may refer to:
Second Military Medical University, China System Memory Management Unit, an IOMMU by ARM Smack My Marine Up, in the List of Doom source ports PIMCO Short Term Muni Bond Strategy ETF (NYSE Arca code: SMMU); See List of American exchange-traded funds SMMU, a force of the Austrian Armed Forces
See also Santa Monica-Malibu Unified School District (SMMUSD), US Stefano Moshi Memorial University College (SMMUCo), Tanzania