electrical switches

[YVE67]

Hi
Can anyone give me diagrams and descriptions of the following electrical switches (laymans terms)please
1, Single-pole
2,double-pole
3,one-way
4,two-way
5,double-gang
6,intermediate

I am very confused with all of this.

Many Thanks in advance

 

[PrenticeBoyofDerry]

1, Single-pole, only switches the live conductor not the neutral (on/off)
2,double-pole, switches/isolates both live and neutral
3,one-way, only one switch can operate a light
4,two-way, two switches can operate the same light
5,double-gang, the face plate has two switches on it or sockets outlets
6,intermediate, this is used with two way switches and allows more than two switches to operate the same light.

Useful info on lighting here:
http://www.diynot.com/wiki/electrics:lighting