Read the following scenarios and choose a suitable combination of input and output devices to best support the intended interaction. It may help to identify typical users or classes of user and identify how the devices chosen to support these people in their tasks. Explain the major problems that the input and output devices solve.

1. Environmental database A computer database is under development that will hold environmental information. This ranges from meteorological measurements through fish catches to descriptions of pollution and will include topographical details and sketches and photographs. The data has to be accessed only by experts, but they want to be able to describe and retrieve any piece of data within a few seconds.
2. Word processor for blind people A word processor for blind users is needed, which can also be operated by sighted people. It has to support the standard set of word-processing tasks.