What is the result of the following expression in postfix notation? 40 10 / 4 * 20 +

Information stored in secondary storage is organized into aggregates called __________.

a. hardware b. files c. bytes d. memory cells e. none of the above

An information system that operates in the _____ sphere of influence supports two or more people who work together to achieve a common goal.

A. personal B. workgroup C. enterprise D. social