There are no figures for chapter 7.
There are four example programs for chapter 7: download chapter7.zip.
Klingon programmers? Visit http://public.logica.com/~stepneys/joke/klingon.htm.
See http://www.s-direktnet.de/homepages/neumann/sprachen.htm for a sample “Hello, World!” program in assembler. You won’t be fooled into thinking it’s Python.
For more information on calendars, a good place to start is http://www.calendarzone.com/. The calendar FAQ is to be found at http://www.tondering.dk/claus/calendar.html where it is maintained by Claus Tonderling.
You can find out more about UNIX shells, and why longjmp() is sometimes necessary, in Marc J. Rochkind’s book from Prentice-Hall, Advanced UNIX Programming. While the book does require knowledge of C, if you perservere with it you, too, can write your own shell.