What are expansion cards used for?

Are special combinations of keys that tell a computer to perform a command. keypads multi-keys combinations shortcuts

Which describes careers that have similar education requirements but different qualifications? product safety engineers and materials engineers industrial safety engineers and industrial health engineers quality control systems managers and inspectors industrial safety and health engineers and hand packers

What is the purpose of network permissions? a)to control access to network resources b)to convert to wireless networking c)to enable the installation of nics d)to reduce operating costs