Here are the definitions for EOA and EOS from the NetApp Support EOA landing page: https://support.netapp.com/info/web/ECMP1110975.html
EOL = end of life, is not a standard NetApp term. Colloquially in the industry, some think of EOL in the same was NetApp defines EOS.
Definitions
| End of Availability | The last date on which a product will be available for quoting from NetApp's pricelist. |
| End of Support | The last date on which a product will be supported by NetApp. |
| Last Ship | The last date on which NetApp will ship a product for which a purchase order has been placed. |
