A scanner is used to convert a text on images into electronics and digital representation. This can view on the screen. Those scan are digital images can be used in different field. They can be processed to edited and stored in memory or in any storage device.

It looks like a photo copy machine. through a scanner you can make a copy your documents and you can also save it into different type such as document format like word , pdf etc . Digital photo and scan images are typically stored as a bitmap graphics with extension such as .bmp .png .jpj .tifr .