Glossary
EOSL (End of Service Life)
Often used interchangeably with EOS, though some vendors distinguish EOSL as the final point after which even third-party or extended support is not commercially viable.
In IBM's own terminology, EOS (end of service) is the operative term; EOSL is more common in the broader IT asset management and TPM industry. For practical purposes on this site, treat them as referring to the same milestone unless a specific vendor draws a finer distinction.
Related Terms
EOS (End of Service)
The date IBM stops providing standard hardware maintenance, machine code updates, and parts commitments for a specific model.
TPM (Third-Party Maintenance)
Hardware maintenance provided by a vendor other than IBM, typically after IBM's own end-of-service date, at 50-70% below OEM pricing.