Hi Anonymus, from Wikipedia:
Short Message Service (SMS) is a service available on most digital mobile phones (and other mobile devices, e.g. a Pocket PC, or occasionally even desktop computers) that permits the sending of short messages (also known as text messages, or more colloquially SMSes, texts or even txts) between mobile phones, other handheld devices and even landline telephones. The term text messaging and its variants are more commonly used in North America, the UK, and the Philippines, while most other countries prefer the term SMS. Text messages are often used to interact with automated systems, such as ordering products and services for mobile phones, or participating in contests. There are also many services available on the Internet that allow users to send text messages free of charge.
Text Messaging = SMS (Short Message Service) = Servicio de Mensajes Cortos