There are many types of printers primarily differentiated on the basis of working technology behind them. However, they are broadly classified into impact and non-impact printers.

Diodes are important two terminal devices which are used in many electrical components. They fall into the group of passive electrical devices. Generally, they allow flow of current in only one direction and...

Maser generally refers to a device which is used for creation and amplification of an intense and coherent beam of high frequency radio waves. Laser is same as the maser, but it specifically applies to...