History of computer

salam to everyone
today i talk about computer. computer invented just for calculation. because in past era a lot of business has a huge probluem is that they could not calculate a account so at that time people invented abacus. abacus was intvented about 500 year ago in asia minor.it is considered the first computer.

so the history of computer is mainly divided into three ages.
1.Dark age(3000 BC to 1890 AD)
2.Middle age(1890 Ad to 1940 Ad)
3.Modern age (since 1940)

but just talk about modern age
so we have 5 generations
1.(1940 – 1956) First Generation – Vacuum Tubes. These early computers used vacuum tubes as circuitry and magnetic drums for memory
2.(1956 – 1963) Second Generation – Transistors.
3.(1964 – 1971) Third Generation – Integrated Circuits.
4.(1972 – present)Fourth Generation – Microprocessors.
5.(Present and Beyond)Fifth Generation- Artificial Intelligence.
now a days every businessman operate only 4th generation.
because they can easliy save a huge data.

CENTRAL PROCESSING UNIT:

the central processing unit (cpu) is the brain of the computer sytem where processing or calculating functions take place & raw data is transformed into meaningful information.
COMPONENTS OF CPU:
1.Arithmetic & logic unit
2.Control unit
3.Memory unit
(a)ROM
(b)RAM
4.Hardware
5.Microprocessor
but this component connect by the help of motherboard