First, the basic concept
1 storage program works with von Neumann machine
(1) binary code represents data and instructions .
(2) using the stored program work
a, pre-programmed
b, the program stored in the memory of the computer
c, will automatically be continuously taken out sequentially execute instructions from a computer memory at runtime
(3) hardware system consists most 5
The computer hardware system by the operator, storage, controller, input devices, output devices five devices constituting
2 hardware and software composition and level of computer results
(1) Hardware System: computer hardware system refers to the physical device may be a touch entities.
(2) software systems: computer software generally refers to a variety of programs and files. Because they are represented in the computer that can not directly touch binary information, so called software.
Software is divided into: system software and application software.
Note: Only computer hardware is called bare metal.
Second, the development of computer history
1 first computer came in 1946, named ENIAC.
2 to the device as a standard division
1) The first generation: tube computer. Time 1946 to 1957
2) The second generation: computer transistor. Time from 1958 to 1964
3) The third generation: small and medium-scale integrated circuit (IC) computer. Time from 1965 to 1970
4) Fourth Generation: LSI (LSL) and very large scale (VLSI) computer time 1970 ~
3 division of the era of computer language
1) The first generation: machine language. Each binary coded instruction
2) The second generation: Assembly: symbol programming, and hardware specific machine instructions and related
3) The third generation: high-level language.
4) The fourth generation: he was in fact an integrated high-level language on the basis of a modular language.