Computers are often presented as general purpose tools for thought, creativity, communication or other sorts of human flourishing. And for many of us who work with them, computers are intrinsically interesting puzzle boxes.

But it's important to remember their historical origins and continuing role as practical tools of control. Specifically in two domains: financial and military. Computers aren't being misused or corrupted when you see them employed by accountants and generals. Those are the people who paid for the very first models. Those have always been the primary customers. The rest of us are the strangers misusing their tools.

@graydon okay, this is clearly the case with regards to military. How's it the case in terms of finance?

@vathpela IBM (nee CTR), NCR, Burroughs (nee American Arithmometer) etc. all have roots in accounting office equipment -- mechanical adding machines, tabulators, bookkeeping etc.

https://en.wikipedia.org/wiki/Accounting_machine

Accounting machine - Wikipedia

@graydon I guess I don't normally think either "office equipment" or "accounting" means "finance".
@vathpela I guess the distinction here is "financial professionals in non-financial businesses" (which you're saying is not-finance) vs. "financial professionals in financial businesses"? I'm including both, but I think the point stands even if you narrow to the latter category: banks and insurance companies dominate early computing customer lists.
@vathpela (Unless you're talking about the very-narrow sense in which the word is sometimes used, just to refer to capital-markets or investment-banking functions, which I am less-certain about the early-computing use of, at least the dealmaking parts if not the trading parts. But .. I don't think the slightly-broad use of the term "finance" covering the whole sector is particularly odd. See for example the Global Industry Classification Standard sector grouping for "financials")
@vathpela (And even within investment banking, it's worth noting that real-time stock-ticker feeding was a primary use-case that built out computer-adjacent peripheral mechanisms such as telegraph networks. Eg. the "thousand stock tickers installed in the offices of New York bankers and brokers" in the 1880s: https://en.wikipedia.org/wiki/Ticker_tape#History)
Ticker tape - Wikipedia