S1S5

S1S5 is a term used in multiple fields to denote a grouping or range of items labeled S1 through S5. There is no single, universally recognized definition, and the meaning depends on the context being discussed.

In computer power management, S-states refer to low-power modes in ACPI. S0 is the working state, while S1 is a light sleep state and S5 is the soft-off state. In this context, S1S5 is sometimes used informally to indicate systems that support both S1 and S5 states, or to describe a transition path that includes S1 and finishes in S5. It is not an official ACPI term, but may appear in vendor documentation or BIOS configuration to signal broad sleep and power-down capabilities.

Outside of power management, S1S5 appears in other domains with different meanings. In transportation or service routing, S1 and S5 can denote specific lines or segments, and S1S5 may describe a combined service or a sequence of routes, though the exact interpretation is determined by the issuing agency. In electronics, product catalogs, or model naming, S1S5 may serve as a model number or family identifier, again with meaning defined by the manufacturer.

To determine the precise meaning of S1S5 in any given document, it is essential to consider the surrounding context, accompanying standards, and any notes from the issuer.