Excellent presentation (to undergrads I presume) outlining background to semiotics and semantics.
Great start – asks the participants in 15 seconds to define ‘forward’.
Works through the basics of symbols, icons and indices. This in turn leads on to the importance of context (more important for symbols e.g. language than for icons).
Follows on from this to explain the need for rules and agreed terminologies – leading to Ontologies.