> If I remember correctly (when threading was invented in the mid-1980s) > threads were originally described as "lightweight processes". According to http://www.serpentine.com/blog/threads-faq/the-history-of-threads/ that's when threads where *reinvented*. They were originally invented in 1965, on Multics (1970) they were used to perform compilation in the background. When Unix came along, it *added* address space separation, introducing what is now known as processes. > The > perceived advantage at the time was the ability to have multiple threads > of control with shared memory: this was much faster than the available > inter-process communication mechanisms. On a single-processor computer > synchronization was much less of a problem. Historically, it was vice versa. First there were threads/processes/tasks with shared variables, semaphores, etc, and later address space separation was added. Regards, Martin
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