| o | Language.Copilot.Variables |
| OnlyErrors | Language.Copilot.Dispatch, Language.Copilot.Interface, Language.Copilot |
| Operator |
| 1 (Type/Class) | Language.Copilot.Tests.Random, Language.Copilot |
| 2 (Data Constructor) | Language.Copilot.Tests.Random, Language.Copilot |
| Operators | Language.Copilot.Tests.Random, Language.Copilot |
| opsF | Language.Copilot.Language, Language.Copilot |
| opsF2 | Language.Copilot.Language, Language.Copilot |
| opsF3 | Language.Copilot.Language, Language.Copilot |
| Options | Language.Copilot.Interface, Language.Copilot |
| Opts | Language.Copilot.Dispatch, Language.Copilot.Interface, Language.Copilot |
| outputDir | Language.Copilot.Dispatch, Language.Copilot.Interface, Language.Copilot |
| Outputs | Language.Copilot.Core, Language.Copilot |
