Text-to-speech (TTS)
Definition: Text-to-speech is often used interchangeably with "screen reader" to refer to the vocalisation of information from a screen, but strictly speaking a TTS system reads nothing but text. While this can be a useful aid to partial sight, a blind user will need extra contextual information conferred through visual means (for instance that something is a button in a ribbon or dialogue) or formatting (such as a heading on a webpage).
Category: technology
Credit: RNIB
Source: http://www.rnib.org.uk/livingwithsightloss/computersphones/pages/glossary.aspx