1. The creation of the computer
The world's first general-purpose computer "ENIAC" was born on February 14, 1946 in the United States, , University of Pennsylvania. The inventors are Americans John W. Mauchly and J. Presper Eckert.
1 history of computer development _span _span It is divided with the development of computer hardware. The representative computer hardware is electron tube, transistor, integrated circuit, and large-scale integrated circuit. Therefore, we generally use the internal electronic hardware of the computer to distinguish:
Figure ( 2) The development stage of the computer
Figure (2) The development stage of the computer
3. The basic composition of the computer _span 4 spanspan 1 spanspan 1 spanspan 4 It mainly includes two parts: hardware and software; the hardware part is mainly composed of input and output systems, CPU (central processing unit), and memory; the software system mainly includes system software and application software,Figure (3)
Figure (3) Computer system composition
Figure (3) Computer system composition
strong_strong_strong_span4. computer hardware is mainly composed of the following components: 1. Motherboard (responsible for the connection of various computer components and information exchange) 7 p _p br0 p1 7 span 2. CPU (central processing unit, the brain of the computer is composed of arithmetic unit and controller)
Figure (5) Central processing unit
3. Memory (mainly includes memory, hard disk , CD-ROM, etc. is the computer storage data space)
Figure (5) Memory
4. Input components (mouse, keyboard, etc.)
img pimg p _span4Figure (6) Mouse
5. Output components (display, audio, etc.)
Figure (7) Display
Note: Computer memory capacity conversion unit: = _KB=1024B=span4_KB=1024B=span4_KB_span_1024 = 1024p1span_1024 1GB=1024MB=1024*1024kb
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