PTT

Meanings

1. Initialism of professional technical trainer.
2. Initialism of postal telephone and telegraph.
3. Initialism of platform terminal transmitter.
4. Initialism of Partitioning tracer test.
5. Initialism of partial thromboplastin time.
6. Initialism of polytrimethylene terephthalate.
7. Initialism of protein truncation test.
8. Initialism of part task trainer (See Flight simulator at Wikipedia).
9. Initialism of push-to-talk.
10. Initialism of push-to-transmit.
11. Initialism of press-to-talk.
12. Initialism of press-to-transmit.