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From The Digital Antiquarian's article on "The Hobbit": Megler  recruited a partner to work with her on the game, Philip Mitchell , a fellow senior with whom she had already worked on a number of group projects and whom she knew to be both easy to get on with and a skilled programmer. Milgrom  himself added a third member to the team ...
The first free source management system was RCS developed by Walter F Tichy in 1982. If you follow the references in his original 1982 paper, cited in the Wikipedia article, you will get answers to some of your other questions.
$ is the default prompt prefix for a non-escalated bourn or sh shell on most *nix systems. It signifies that the code exemplified should be executed using one of those associated shells. zsh and csh have % as a prefix. The fish shell uses >. Putting the prefix is simply a quick way to let the reader know what shell the command is destined for.
It can be hard to reconcile push models with separation of concerns. Loose coupling, generally seen as good practice, means designing the components of your system with minimal dependencies and the least possible knowledge of the overall structure and other components. Push semantics either break this (if implemented simplistically) or add significant ...
In 1981, I worked a summer job at Charter Information in Austin TX. They were formerly Commercial Information Corporation of Woburn MA. They ran a Xerox Sigma 6 that had been field-upgraded to a Sigma 7. They used a thing called SPUD (Source Program Update) for source code control. It was tape-based. I routinely mounted the "bicentennial SPUD tape" and ...
Even today, there are some areas, where you have to pull data, because a push option is simply not available to you. As far as those that I know of, these have been around for a long long time, such that early systems may have simply accepted from those that pull is the way to go. Let's start with a very simply example: you want to monitor a folder on your ...
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