During the mid XX century, scientists learned that Venus has massive quantities of nitrogen and sulfuric acid among other useful materials in its atmosphere. So at the end of the XXI century, a few private companies built aerostat colonies avoiding the harsh Venusian conditions on the ground, like Frauenliebe’s industrial cloud top settlement over Rusalka Planitia. These floating habitats are used to extract gases and to house personnel, equipment, airships and landing rockets. Unmanned smart canisters are filled with processed materials, which are then shipped to Low Venusian Orbit using an active supported mass driver.
This project started as an entry for an Artstation challenge and as part of an episode of Isaac Arthur's Science and Futurism YouTube channel on Venus' colonization which can be seen here: https://www.youtube.com/watch?v=BI-old7YI4I&list=PLIIOUpOge0LsIzYlIAIRdAGJTqAW6FmCE&index=2