Fourteen Years After

A Stone In Heaven, see here.

We saw Dominic Flandry grieving for his murdered fiancee on Dennitza, then ordering the bombardment of Chereion. Next we see him fourteen years later on Terra where:

"...ordinarily he did his business through computers, infotrieves, and eidophone, with the latter set to show no background." (III, p. 28)

I am having trouble with those last two words:

is an "eidophone" a telescreen?;

now we retrieve information from our computers - did Anderson envisage a different device for this purpose?

It seems to function like a PC or laptop:

"Flandry stretched out an arm and keyed his infotrieve. What he wanted flashed onto the screen." (p. 41)

A Stone In Heaven was published in 1979, before the Internet. To imagine the technology of the Terran Empire, we have to go back (in this case) to 1979, then forward again for over a thousand years but along a different timeline.