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Facility Limit Hold

Facility Limit Hold

Facility Limit Hold Input/Output (I/O) is a general term for devices that send external world information to a computer and devices that return processing results to the outside world. These returned results may be visually experienced by the user or as input to other devices controlled by the...

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Facility Limit Hold



Input/Output (I/O) is a general term for devices that send external world information to a computer and devices that return processing results to the outside world. These returned results may be visually experienced by the user or as input to other devices controlled by the computer: for a robot, the output of the control computer is basically the robot itself, such as making various behaviors. .
The first generation of computers has very limited types of input and output devices. A typical input device is a card reader for punching cards, which is used to import commands and data into memory; and an output device for storing results is typically a tape. With the advancement of technology, the richness of input and output devices has been improved. Take a personal computer as an example: a keyboard and a mouse are the main tools for a user to directly input information to a computer, while a display, a printer, a loudspeaker, and a headset return processing results. There are also many input devices that can accept other different kinds of information, such as digital cameras that can input images.
Two types of input and output devices are worth noting: the first is a secondary storage device, such as a hard disk, a compact disc, or other slow-moving device with a very high capacity. The second is computer network access devices, and the direct data transfer between computers realized by them greatly enhances the value of computers. Today, the Internet has enabled tens of millions of computers to transfer various types of data to each other.

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