Pipelines transport gases and liquids in common practice, and have been used to transport solid capsules through pneumatic tubes. Gas and liquid commodities transported through pipelines include:
List of Pipelines
- Trans-Afghanistan Pipeline (TAP)
- Trans-Alaska Pipeline System (TAPS)
- Baku-Tblisi-Ceyhan Pipeline (BTC)
Pipeline transport has become a metaphor for "pipelines", a term used in computer science, electrical engineering, and manufacturing.