https://en.wikipedia.org/wiki/List_of_technology_centers#Globally_prominent_clusters
Despite more people working from home, there is still a need for various tech offices & factories...
https://siteselection.com/issues/2024/jan/24-for-24.cfm
https://www.sovtech.com/blog/worlds-biggest-tech-hubs
https://www.fullstackacademy.com/blog/top-cities-for-tech-roles
https://www.wearedevelopers.com/magazine/best-cities-for-tech-jobs
https://www.visualcapitalist.com/biggest-tech-talent-hubs-in-us-canada/
https://dealroom.co/guides/top-tech-ecosystems
Hardware, because it's not just about software. Unfortunately, automation will gradually continue to reduce jobs for people.