Output, input, Storage and Speed of the Computer

Questionnaire on Computer Output, Input, Save, and Speed ​​Printing Intelligent character recognition (ICR) is the best choice. Its ICR technology allows data capture software to automatically read information from any kind of document - handwritten documents. Phone survey - speech recognition is best, as the speech input device can be programmed to distinguish answers spoken to the recipient and allow them to be completely executed by the computer is. Bank inspection - Scanning devices that recognize barcodes are called Magnetic Ink Character Recognition (MICR) magnetic scanning input devices.

For speed reasons, the main storage is connected "closer" to the processor than to the I / O device. Most devices (internal disks, printers, etc.) are low computers themselves because they have a simple processor that facilitates information transfer to and from the device. For humans, information is pictures, symbols, words, sounds, actions and so on. A typical computer has a keyboard and mouse so you can send words and movements to the processor as information. The information must be converted into electrical connection ("0 and 1") pulses transmitted on the bus reaching the processor, which can be stored in the main memory.

Various forms of storage devices are divided according to their distance from the central processing unit. The basic components of a general purpose computer are an arithmetic logic unit, a control circuit, a storage space, and an input / output unit. General household computer technology and capacity around 2005 In 'modern' applications 'memory' is typically a semiconductor memory read / write random access memory, typically DRAM (Dynamic RAM) or other form of high speed but temporary . "Storage" refers to storage devices and their media that can not be directly accessed by the CPU (usually slower and nonvolatile devices (hard drives, optical drives, and RAM) that are slower than RAM and retain content even when the power is turned off) is.