At the risk of stating the obvious, we can say that IT has evolved a lot since its beginnings. From mainframe to cloud, a number of steps have been taken, technologies have appeared, and in this context it seems interesting to study the past to try to understand the future. Especially since it seems to us that the architect must and will play an increasingly important role.
We thus see three great eras emerging that we can trace from the inception of what is now called "Enterprise IT."
