The conjunctiono is the equivalent of the English "or" and is typically used in the same way:

• Muchos pasan cinco o más horas al día en Internet. Many spend five or more hours a day on the Internet.
• Tenemos música para escuchar o descargar. We have music for listening or downloading.
• Podrá grabar sus programas favoritos, diariamente o semanalmente. Daily or weekly, it will record your favorite programs.

• ¿Qué se inventó primero, la mesa o la silla? Which was invented first, the table or the chair?
• No sé si me tienen confianza o no. I don't know if they have confidence in me or not.

When the o precedes a word that starts with the o sound (words that begin with o- or ho-), the o is changed to a u:

• Se venden computadores para tu negocio u hogar. We sell computers for your business or home.
• Evite el contacto con la piel u ojos. Avoid contact with the skin or eyes.

When an o comes before numbers written in numeral form, it is common to put an accent on the o in order to avoid confusion with 0: Tengo 3 ó 4 minutos. I have 3 or 4 minutes. But, tengo tres o cuatro minutos.

The concept of either/or can be expressed in this way:

• Creo que salen u hoy o mañana. I believe they're leaving either today or tomorrow.
• Mi prioridad siempre es o mi familia o llegar al juego a tiempo. My priority is always either my family or arriving at the game on time.

See the lesson on singular or plural for an explanation of one way in which o functions differently than does "or."