Tags give the ability to mark specific points in history as being important
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release/21.1.303674da87 · ·ATR-18233: Tagging AthenaP1, 21.1.30 from nightly/21.1/2018-05-22T2138 for online data-taking 
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release/21.5.52c394f5b · ·The release for MC production for validating trigger update, for FTK, MET and Tau trigger groups. Built from 21.0-TrigMC,Athena,2018-05-16T2157 
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release/21.1.299de5b532 · ·ATR-18186: Tagging AthenaP1 21.1.29 from nightly/21.1/2018-05-14T2139 for online useage 
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release/21.2.31.01e818e3f · ·AthDerivation-21.2.31.0, primarily for HIGG1D1 and EXOT24, EXOT25 & EXOT26 (for monoHbb analysis) 
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release/21.2.10.14be29d57 · ·AthDerivation-21.2.10.1. This cache is a clone of 21.2.10.0, with the zero-event merging issue fixed. It also has a modified skim criteria for HIGG4D4. The cache was built by hand from 21.2.10.0. 
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release/21.3.2889c9165 · ·This release exactly matches `release/21.3.1` except that the `HepMcParticleLink` migration has been applied. 
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release/21.2.30.0957ada4a · ·AthDerivation-21.2.30.0 - second cache for 2018 open ended production and all other data/MC for release 21. Fixes a per-mille crash in flavour tagging: ATLASG-1430 
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release/21.1.278a57f555 · ·Newest tag for P1 release, as requested here https://its.cern.ch/jira/browse/ATR-18026 
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release/21.3.128add3da · ·This purpose of this release is to provide a baseline for the validation of [MR !10373] The HepMcParticleLink Migration. It also contains improved support for NSW Simulation. It is most closely related to the release/21.0.69 tag. 
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release/21.2.29.04c64ee9e · ·AthDerivation-21.2.29.0, for the bulk 2018 open ended production. Supersedes 21.2.28.0 which is missing some SUSY updates. 
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release/21.2.28.02faf4c0e · ·AthDerivation-21.2.28.0, to be used for the start of the 2018 open ended production.