I believe the answer is A
Answer:
Mainframes (also called "big iron")[1] are powerful computers used for large information processingjobs. They are mainly used by governmentinstitutions and large companies for tasks such as census, industry and consumer statistics, enterprise resource planning, and financial transaction processing. Mainframe computers are specially used as servers on the World Wide Web (WWW). They are distinct from supercomputers.
Application of a new technology and is much superior to rival products
Device management is the process of managing the devices in your computer.
In your computer you have the so-called device manager, in which all the drivers of your devices are installed. Device Manager allows you to monitor and manage each of its devices. You can also uninstall and update your devices in device manager. And the process of doing it is called device management. It is very simple to do this kind of stuffs as long you are familiar with your devices like mouse, printer, keyboard, etc.
