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Input, Output, Processing and Storage Devices.
Transcript of Input, Output, Processing and Storage Devices.
An input device is any hardware device that converts real life information into information that the computer can read (binary). A mouse is an input device, it converts real life hand movements and presses into information that controls where the cursor goes and clicks.
The CPU (Central Processing Unit) is made up of the RAM and the processor. It is known as the brains of the computer. The processor uses the fetch, decode and execute cycle to process almost everything. The RAM first stores the .exes or anything that is being opened in it, acting like a temporary storage so it's easily accessed by the processor. The processor fetches the information from the RAM. Decodes the information into a computer readable format (binary) and executes the information. All of this happens millions of times in one tick of a clock. The clock speed (processor speed) is measured in Hertz (HTz). One Htz means one only one piece of binary is executed in a second (Harrish's brain). Since a lot of pieces of binary are execute in a second, we use MegaHertz (MHTz) or GigaHertz (GHTz) so it's easier to measure the speed of the processor. 1 GHTz is 1024 MHTz and 1 MHTz is 1024 HTz. WOW!
More on the Processor
The first microprocessor was the Intel 4004, introduced in 1971. The 4004 was not very powerful -- all it could do was add and subtract, and it could only do that 4 bits at a time.
Different Input Devices
Joystick: The joystick is used mainly for playing games. Joysticks were first used in console gaming, such as the Atari and Commodore 64. When computers began to be a part of every home, video games flooded the market. To improve on gamers' experiences, the hardware manufacturers developed joysticks that connected to computers. Joysticks give video games commands, so they are a part of the input device category.
Scanner: Scanners are devices that record images from documents or photographs. The scanner runs over the colors and writing on the paper, and the device sends it to the computer. Users normally have custom software that is included with the scanner. This software displays the images that were taken from the scanner's surface.
When you type information into a Word document, you see it appear almost instantly on the screen. Likewise, when you type a sum into an Excel spreadsheet, you see the result appear when you press the [Enter] key. The PC's processor knows nothing about how Word or Excel actually works. These programs are written in a code that is understood by the processor.
Output devices are devices that take
any sort of information on a computer and turn into real world information.
The television is an electronics device that receives a visual and audible signal and plays it to the viewer. Although debated the TV is often credited as being invented by Vladimir Kosma Zworykin a Russian-born American who worked for Westinghouse, and Philo Taylor Farnsworth, a boy in Beaver City, Utah who was backed by George Everson. Vladimir held the patent for the TV, but it was Farnsworth who was the first person to first successfully transmit a TV signal on September 7, 1927.
headphones are a hardware device that either plugs into your computer (line out) or your speakers and allow you to privately listen to audio without disturbing anyone else.
Nathaniel Baldwin inveted headphones
a storage device is a hardware device capable of holding information. There are two storage devices used in computers; a primary storage device such as computer RAM and a secondary storage device such as a computer hard drive. The secondary storage could be a removable, internal, or external storage.
The Hard drive
the hard drive is the computer's main storage media device that permanently stores all data on the computer. The hard drive was first introduced on September 13, 1956
Although most hard drives are internal hard drives, many users also use external hard drives to backup data on their computer and expand the total amount of space available to them. External drives are often stored in an enclosure that helps protect the drive and allow it to interface with the computer, usually over USB
Future of storage
Today the main storage devices are
USB's, CD'S and hard drives although in the future we may not use any of these devices. We may store things inside of our cells and by touching the computer you will be able to access stored information. Even though you may not think it but the future is closer than you think!