Minitel rolled into production in 1983. In order to achieve critical mass, the state primed the market and gave out the terminals for free in all French post offices. The terminal below is not the original one but likely the first to have a retractable keyboard. While it does connect to Minitel services by way of the French telephone network, it cannot easily be coupled with a home computer.
Above is a picture of Minitel 1 with the retractable keyboard shut. Below to the left is the same Minitel with the keyboard pulled out. To the right is our Minitel 5 laptop.
Below is a scan of the user manual that came with the above Minitel 1.