CESR may refer to:
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Center for Economic and Social Rights, an international human rights organization
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Centre d'Etude Spatiale des Rayonnements, now the Institut de Recherche en Astrophysique et Planétologie (IRAP), in France
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Committee of European Securities Regulators, replaced since 2011 by the European Securities and Markets Authority (ESMA)
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Cornell Electron Storage Ring
The Cornell Electron Storage Ring (CESR, pronounced Caesar) is a particle accelerator operated by Cornell University and located 40 feet beneath a football field on their Ithaca campus. The accelerator has contributed to fundamental research in hi ...
, a particle accelerator operated by Cornell University, in Ithaca (state of New York)
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Carrier Ethernet Switches and Routers, a marketing term
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