What computer is designed to meet the computing needs of several people simultaneously in a small to medium-size business environment?

Answer: Mini computer or mid-range computer

Explanation:

Mini-computer are the computers that is used for purpose of serving engineering, business and scientific processing. It provides storage, processing, DBMS (database management system), handling and management of files and data etc.

Mini-computers are also known as mid-range computer. Example-IBM Power System. These computers are usually used for server processing from small to medium sized fields. This range of computer is between mainframe and microcomputer.