1-Stain and pressure
2-Position,direction,distance and motion
3-Light and associated radiation
4-Temperature sensors and thermal transducers
5-Sound,infrasound and ultrasound
6-Solids,liquids and gases
7-Environmental sensors
8-Other sensing methods
9-Instrumentation techniques
10-Switch principles
11-Switch mechanisms
12-Signal-carrying switches
Appendix A:Suppliers of sensors and transducers
Appendix B:Glossary of terms