EOL
acronymops culturegovernance & risknetworking
Stands for: end of life
End of life: the date after which a product receives no fixes, no patches, and no vendor sympathy.
Vendors publish staged sunsets, end of sale, end of software maintenance, end of support, and the final EOL, after which running the product means running unpatchable known vulnerabilities. Auditors treat EOL software as a standing finding, attackers treat it as a standing invitation, and half the industry's worst incidents trace to fleets past their dates. Tracking the dates is unglamorous and decisive, which is exactly the kind of work a tool should do for you.
Also known as: end of support, EoS