Besides ordinary religious manipulation-tools the Egyptians were masters of using architecture for propaganda. In Egypt, most of all, architecture was used as a media to demonstrated power, whereas the Greek and Romans used other types of art, like statues, for political propaganda.
The pyramids, palaces, tombs became tools for power demonstrations. Paintings and carvings (like on obelisks) proved the might of the rulers.
All those signs of power were done to make people compare their ruling dynasty to gods and keep them politically silent, because religion was used for justifying mortal power. Marble, gold, jewelry and artists were the tools for those maneuvers. Whereas questions for the truth were not even asked or listened to.
Finally it was the masses who were used for propaganda, when they were not only forced to work as slaves on those signs of power but also were abused for those power demonstrations, when they had to accompany the dead king into his tomb - dying of hunger, thirst, lack of oxygen and in darkness. The more religious disinformation the more luxury. The more luxury the better. The more luxury the more power.
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Digital technologies are used to combine previously separated communication and media systems as telephony, audiovisual technologies and computing to new services and technologies, thus forming extensions of existing communication systems and resulting in fundamentally new communication systems. This is what is meant by today's new buzzwords "multimedia" and "convergence".
Classical dichotomies as the one of computing and telephony and traditional categorisations no longer apply, because these new services no longer fit traditional categories.