OCTL
| Acronym | Definition |
|---|---|
| OCTL | Optical Communications Telescope Laboratory |
| OCTL | Oil Creek and Titusville Lines, Inc. (railroad; Pennsylvania) |
| OCTL | Oil Country Tubular Limited (Hyderabad, Andhra Pradesh, India) |
| OCTL | Oilfield Chemical Technology Ltd. (Aberdeen, Scotland, UK) |
| OCTL | Open Circuit Transmission Line |
| OCTL | One-Channel-To-Line |