He is known for : Abelian von Neumann algebraAffiliated operatorAmenable groupArithmetic logic unitArtificial viscosityAxiom of regularityAxiom of limitation of sizeBackward inductionBlast wave (fluid dynamics)Bounded set (topological vector space)Carry-save adderCellular automataClass (set theory)Computer virusCommutation theoremContinuous geometryCoupling constantsDecoherence theory (Quantum mechanics)Density matrixDirect integralDoubly stochastic matrixDuality TheoremDurbin–Watson statisticEDVACErgodic theoryexplosive lensesGame theoryHilbert's fifth problemHyperfinite type II factorInner modelInner model theoryInterior point methodLattice theoryLifting theoryMerge sortMiddle-square methodMinimax theoremMonte Carlo methodMutual assured destructionNormal-form gameOperation GreenhouseOperator theoryPointless topologyPolarization identityPseudorandomnessPseudorandom number generatorQuantum mutual informationQuantum statistical mechanicsRadiation implosionRank ringSelf-replicationSoftware whiteningSpectral theoryStandard probability spaceStochastic computingStone–von Neumann theoremSubfactorUltrastrong topologyVon Neumann algebraVon Neumann architectureVon Neumann bicommutant theoremVon Neumann cardinal assignmentVon Neumann cellular automatonVon Neumann interpretationVon Neumann measurement schemeVon Neumann OrdinalsVon Neumann universal constructorVon Neumann entropyVon Neumann EquationVon Neumann neighborhoodVon Neumann paradoxVon Neumann regular ringVon Neumann–Bernays–Gödel set theoryVon Neumann universeVon Neumann conjectureVon Neumann's inequalityVon Neumann's trace inequalityVon Neumann stability analysisVon Neumann extractorVon Neumann ergodic theoremVon Neumann–Morgenstern utility theoremZND detonation mode Rupees from Wikipedia. But damn that's quite a lot of accomplishment that I don't really understand.