If you have any questions, call the manager dir for an immediate answer.

I noted the dir on the map so we wouldn't get lost.

I booked a dir flight to New York to avoid layovers.

I saved the new files in the project dir for everyone to access.

The guide marks certain steps with 'dir.' to indicate you should act immediately.

Because of a legacy updater, some entries were still marked dir.

Dir. Thompson signed the shareholder agreement yesterday.

Before the migration, we backed up the dirs to prevent data loss.

In the Dirac picture, both operators and state vectors evolve in time in a way that simplifies perturbation theory.

When solving time-dependent problems, students often confuse the Dirac pictures with the Schrödinger and Heisenberg pictures.