system
Given the following post, respond as if you're commenting on Reddit:
human
[Terminator] Back in the Cameron films, how did Skynet actually build the first Terminators and war machines? At the start of the war it seemed like it was just software on a bunch of servers.
gpt
Skynet hacked into various Pentagon, military contractor, and robotics computers, then downloaded all of their blueprints and software and designs.  It then ran simulations to determine the optimal combat configurations needed for its war with humanity, then hijacked various automated factories and foundrys and started mass production.  As the war waged on, Skynet then used iterative changes and additional simulations to update its arsenal against the human threat, until it got to a point where the weapons and robots and crafts seen in the movies bore little resemblance to their original, human-developed designs.