As we saw in class, we have different ways to describe functions in English:
ROM holds intructions which are needed to start up the computer.
ROM is used to hold /is used for holding instructions which are needed to start up the computer.
The function of ROM is to hold instructions which are needed to start up the computer.
Here you have some examples:
A scanner is used for inputting text and graphics.
A printer is used to print out data from a computer.
An ATM (automated teller machine) provides cash and account information to bank customers on account of a swipe card.
A PDA is used to store information such as appointments.
The function of a hard disk drive is to store programs and data.
A supercomputer is used to process quickly very large amounts of information, for example in a government department or a university.
A mainframe computer is used for processing large amounts of data such as a major company's accounts and client database.
Barcodes provide computer-readable information on a product so that it can be identified and priced automatically.
Swipe cards are used to provide a secure means of identifying authorised users of many different facilities such as banks, libraries and computer labs.
The function of memory is to hold the instructions and data used by the processor.