The IT infrastructure in organizations today is an outgrowth of more than $50$ years of evolution in computing platforms. There have been five stages in this evolution, each representing a different configuration of computing power and infrastructure elements. Select the list below with the correct five eras.

A$.$ general$-$purpose mainframe and minicomputer computing, military computers, client$/$server networks, enterprise computing, and cloud and mobile computing

B$.$ general$-$purpose mainframe and minicomputer computing, personal computers, client$/$server networks, enterprise computing, and cloud and mobile computing

C$.$ academic mainframe and commercial computing, military computers, client$/$server networks, enterprise computing, and cloud and mobile computing

D$.$ special$-$purpose mainframe, personal computers, server networks, enterprise computing, and cloud computing

E$.$ vacuum tube computers, transistor computers, microprocessor computer, enterprise computing, and cloud and mobile computing