Which of following are input devices?

The correct answer is Scanner.

Key Points

• A scanner is an input device, which works more like a photocopy machine.
• It is a device that captures images from photographic prints, posters, magazine pages.
• The scanner captures images from the source which are then converted into digital form that can be stored on the disk.
• These images can be edited before they are printed.

?Additional Information

• A Printer is an output device that accepts text and graphic output from a computer and transfers the information to paper.
  • It is used to generate hard copies and print any document.
  • A document can be of any type such as a text file, image, or combination of both.
  • It accepts an input command to print the documents.
• A Plotter is an output device much like a printer that is used for printing vector graphics.
  • Plotters use a pen, pencil, marker, or another writing tool to draw multiple, continuous lines onto the paper rather than a series of dots like a traditional printer.
• A monitor is an output device that is used to display images, text, video, and graphics information generated by a connected computer.
  • It is an output device that displays information in pictorial form.
  • It is also known as a video display terminal (VDT) or a video display unit (VDU). 
  • The first computer monitor was introduced on 1 March 1973, which was part of the Xerox Alto computer system.