S01

S01 is a concise alphanumeric designation used across several domains to denote an initial version, first season, or primary series identified with the number one. The most common usage is in media metadata, where S01 indicates Season 1 of a television series, web series, or streaming program. In episode guides, it is often paired with E for episode, yielding formats such as S01E01, which helps identify the first episode of the first season. The label is language-neutral and is applied by production companies, broadcasters, and catalog databases to organize content chronologically.

Beyond entertainment, S01 appears in product models, software releases, and catalog codes. In hardware or consumer electronics, it may designate the initial production variant or a particular configuration within a product line. In software development, S01 can be used as an internal milestone or release tag before subsequent versions such as S02, though exact meaning depends on the project’s naming convention.

The meaning of S01 is highly context-dependent and can vary by industry or organization. When encountered, it is best interpreted alongside accompanying metadata such as the project name, version number, or season title to determine its specific significance.