Computing
* Runtime (program lifecycle phase), the period during which a computer program is executing * Runtime library, a program library designed to implement functions built into a programming language * Runtime system, software designed to support the execution of computer programs * Software execution, the process of performing instructions one by one during the runtime phaseArt and entertainment
* The duration of a film, song, or television programSee also
* * * * * ''Running Time'' (film) {{Disambiguation