Some web browsers are unable to display all these characters, some of which are needed for the CIS301 lecture notes. So, I made two versions of the notes: one version for ``smart'' web browsers that can display all the html characters, and one version for browsers that cannot.
Test your browser like this:
A final comment: All the program fragments in the ``Text'' version of the lecture notes are executable Python programs that can be copied, pasted, and used as is. If you forgot what Python is, see http://www.cis.ksu.edu/~schmidt/200s08.