Telefon harika bir alettir.
- The telephone is one wonderful device.
Bu alet faydalı olabilir.
- This device may come in handy.
Piller, kimyasal enerjiyi elektriğe dönüştüren aygıtlardır.
- Batteries are devices that convert chemical energy to electricity.
Bu makinede bir güvenlik aygıtı yok.
- This machine doesn't have a safety device.
Prior to the issuance of the first stamps, letters accepted by postmasters for dispatch were marked Paid by means of pen and ink or hand stamps of various designs. To facilitate the handling of mail matter, some postmasters provided special stamps or devices for use on letters as evidence of the prepayment of postage.