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- reformated content (ch03)2010-02-21, by meillo
- rearrangements of headlines; summary (ch03)2010-02-21, by meillo
- more about portability and reuse (ch03)2010-02-21, by meillo
- wrote about upgrowth and survival (ch03)2010-02-20, by meillo
- some rework about interface arch (ch03)2010-02-20, by meillo
- more about the shell and worse is better (ch03)2010-02-20, by meillo
- corrected spelling2010-02-19, by meillo
- new text about toolchest and shell (ch03)2010-02-19, by meillo
- added two more paragraphs to ch022010-02-18, by meillo
- rewrote ch022010-02-18, by meillo
- new content about interfaces and toolchests2010-02-13, by meillo
- new text about pipes2010-02-12, by meillo
- minor rework2010-02-10, by meillo
- added content about sw design; some formating2010-02-05, by meillo
- further text in intro2010-02-05, by meillo
- early version, mainly the outline2010-02-05, by meillo