2.2 The characteristics of text
Text has a number of technical advantages over other media.
Text files are small. Images, sound, animation and video all produce large computer files, even when compressed. These files can be slow to load from CD-ROM or to transmit via the Internet; this can reduce the usability of the UI. Text files are much smaller.
Text can be manipulated very easily. For example, it is possible to search for words. If you are visiting a website, this sort of facility can save a huge amount of time. This is difficult to achieve with other media.
However, it is probably society's reliance on text-based materials that maintains the central role of text. Nevertheless, although certain sectors of society spend much of their time reading and writing, this is not true for all sectors; as a UI designer you should explore the attitude of your user group to text. For example, you might like to find out their average reading age and the newspapers they read.