How can you capture a signature electronically?

How can you capture a signature electronically?
There are several techniquesUse a scanner device to scan a signature into computer.Use a signature capture pad - these can be attached to your computerso you can sign with a pen. For example - see manufactures: TOPAZ or WACOMSome handheld computers and PDAs come with built in signature capture support.Use a software component like Bennet-Tec Web Signature - allows you to capture a signature within a web page or custom software application
If you mean 'electronic signature', this is a different thing - it can refer to a method of electronically verifying that a document ( possibly including a written signature ) has not changed after the "electronic signature" process.