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For factory workers, the means of production is the factory.

What’s “the factory” for software? Our equivalent of the factory is the organization we work in, and our connection to the people who turn our software into money.

You can write software at home by yourself, just like you can do machining on your own. But there are a lot of steps between making software, or machining, and turning that output into money. By working for a company, you can have other people handle those steps. The tradeoff is that this structure is something owned by someone else.