Digital camera

Digital camera

A digital camera is a camera that takes video or still photographs by recording images on an electronic image sensor.

Digital and film cameras share an optical system, typically using a lens with a variable diaphragm to focus light onto an image pick up device. The diaphragm and shutter admit the correct amount of light to the image, just as with film but the image pick up device is electronic rather than chemical. However, unlike film cameras, digital cameras can display images on a screen immediately after being recorded, and store and delete images from memory. Many digital cameras can also record moving video with sound. Some digital cameras can crop and stitch pictures and perform other elementary image editing.

Game Controller

Game controller

A game controller is a device used with games or entertainment systems to provide input to a video game, typically to control an object or character in the game. A controller is usually connected to a game console or computer by means of a wire or cord, although wireless controllers are also widespread. Input devices that have been classified as game controllers include keyboards, mice, game pads, joysticks, etc. Special purpose devices, such as steering wheels for driving games and light guns for shooting games, are also game controllers.

pen input

Pen input 

Pen input refers to a computer user-interface using a pen (or stylus), rather than devices such as a keyboard, joysticks or a mouse.

Pen input is also used to refer to the usage of mobile devices such as wireless tablet personal computers, PDAs and GPS receivers. The term has been used to refer to the usage of any product allowing for mobile communication. An indication of such a device is a stylus, generally used to press upon a graphics tablet or touch screen.

Touch sensitive pads

Touch sensitive pads

The touch-sensitive pad on a portable media player is an input device. Users can use   scroll through to play music, view pictures, watch videos or movie, adjust volume, and customize settings...

Touch screen

Touch screen

A touch screen is an electronic visual display that the user can control through simple or multi-touch gestures by touching the screen with one or more fingers. Some touch screens can also detect objects such as a stylus or ordinary or specially coated gloves. The user can use the touch screen to react to what is displayed and to control how it is displayed (for example by zooming the text size).

The popularity of smartphones, tablets, and many types of information appliances is driving the demand and acceptance of common touch screens for portable and functional electronics. Touch screens are popular in the medical field and in heavy industry, as well as in kiosks such as museum displays or room automation, where keyboard and mouse systems do not allow a suitably intuitive, rapid, or accurate interaction by the user with the display's content.

Touchpad

Touchpad

A touchpad  is a pointing device featuring a tactile sensor, a specialized surface that can translate the motion and position of a user's fingers to a relative position on screen. 

Touchpads are a common feature of laptop computers, and are also used as a substitute for a mouse where desk space is scarce. Because they vary in size, they can also be found on personal digital assistants (PDAs) and some portable media players. 

Mouse

Mouse

 In computing, a mouse is a pointing device that functions by detecting two-dimensional motion relative to its supporting surface. Physically, a mouse consists of an object held under one of the user's hands, with one or more buttons.

The mouse sometimes features other elements, such as "wheels", which allow the user to perform various system-dependent operations, or extra buttons or features that can add more control or dimensional input. The mouse's motion typically translates into the motion of a pointer on a display, which allows for fine control of a graphical user interface.

Types of Mouse

Optical mouse

    it uses devices that emit and sense light to     detect the mouse’s movement.

Laser mouse

  Uses a laser to move the mouse. It can place on nearly all types of flat surface

Air mouse

  It is  is a motion-sensing mouse, with the typical buttons allow you to control objects, media players, and slide shows by moving the mouse in predetermined directions through the air.