In the beginning, there were Real Programmers.
That's not what they called themselves. They didn't call themselves `hackers', either, or anything in particular; the sobriquet `Real Programmer' wasn't coined until after 1980, retrospectively by one of their own. But from 1945 onward, the technology of computing attracted many of the world's brightest and most creative minds. From Eckert & Mauchly's first ENIAC computer onward there was a more or less continuous and self-conscious technical culture of enthusiast programmers, people who built and played with software for fun.
The Real Programmers typically came out of engineering or physics backgrounds. They were often amateur-radio hobbyists. They wore white socks and polyester shirts and ties and thick glasses and coded in machine language and assembler and FORTRAN and half a dozen ancient languages now forgotten.
From the end of World War Two to the early 1970s, in the great days of batch processing and the ``big iron'' mainframes, the Real Programmers were the dominant technical culture in computing. A few pieces of revered hacker folklore date from this era, including various lists of Murphy's Laws and the mock-German ``Blinkenlights'' poster that still graces many computer rooms.
Some people who grew up in the `Real Programmer' culture remained active into the 1990s. Seymour Cray, designer of the Cray line of supercomputers, was among the greatest. He is said once to have toggled an entire operating system of his own design into a computer of his own design through its front-panel switches. In octal. Without an error. And it worked. Real Programmer macho supremo.
The `Real Programmer' culture, though, was heavily associated with batch (and especially batch scientific) computing. It was eventually eclipsed by the rise of interactive computing, the universities, and the networks. These gave birth to another engineering tradition that, eventually, would evolve into today's open-source hacker culture.