Five components of a computer:
A controller, a computer control system
2 operator, the operation system of the computer
A logical operation, and wrong determination of things
2 math, digital operations
Controller plus operator, the CPU is, its mode of operation is, first read the instructions in memory, then the translation, the step of analyzing an operation corresponding to the command, then control hardware
The reservoir 3, the computer's storage system
1 Memory
A register to store the next small data
2 cache, used to store data (small)
Memory is the main target CPU reads
Memory is based on the role of electricity, power file is missing
Advantages, read speed
Shortcomings, easily lost files
2 external memory
1 hard drive, mechanical hard disk to rotate to read the file, SSDs,
2 cartridges, server file backup
The advantages of permanent preservation
Disadvantage, slow reading speed
4 input devices
For example, a keyboard, a touch screen,
5 the output device
For example, screen, sound, printer
The three core components of the second computer
1 CPU (brain)
2 memory (short term memory)
3 hard drive (a book will not disappear)
A complete set of three computer consists of three parts
1 operating system
2 Applications
3 Computer Hardware