3. The design team hashes out a Product Requirements Document (PRD) that
specifies exactly what the product will do.
4. The tasks identified in the PRD are assigned to teams of programmers who
write their assigned part of the code.
5. When complete, the code is checked in and the product is tested through a
series of testing cycles.
6. When the product has its bugs worked out (or at least most of them), the
finished product is shipped to the customer.
7. The customer uses the product for a period of time and usually identifies bugs
that were missed in the initial testing. In addition, they usually identify new
features and functionality that they would like to see added.
8. The software company receives feedback from the customers and the cycle
begins all over again.
This is how most commercial software products are developed. Linux, on the
other hand, didn??™t conform to this cycle when it was originally developed. Instead,
one person, a graduate student at the University of Helsinki in Finland, initially
developed the Linux kernel. This was Linus Torvalds.
In the early 1990s, Torvalds became interested in a freeware product called Minix.
Developed by Andrew S.
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