E621 may refer to:
Rail locomotives
edit- FS Class E.621, a 1947 Italian model
- E621, a 2013 Japanese E6 Series Shinkansen railcar
Other uses
edit- Monosodium glutamate, a food flavour enhancer (labelled E621 in the EU)
- e621, a booru-style furry fandom imageboard
This disambiguation page lists articles associated with the title E621.
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