1.   An interactive system enables users to interrogate the database and to supply information, as well as drawing from it.

2.   This lateral line system enables the fish to detect differences of pressure in the water.

3.   This system enabled them to maintain an exceptionally dense population, on the best principles of fertility conservation.

4.   The system enables students to access class materials online.

5.   A new voucher system enables kids to choose attractive and colourful frames, which reflect the brightness of mountain bikes and skateboards.

6.   Besides providing convenient access to books and journals, such systems could enable libraries to convert large volumes of printed material into digital format.

7.   A computerized bulletin board system enables comparison shopping by posting the prices of all the competing dealers.

8.   A cost-accounting system enables the company to charge users by the flight.