Vacuum tube.

      the  first generation of computer (vacumm tube )........( 1940 to 56 )

      

.....

a vacumm tube is a device generally usad to amplify  a signal by controlling 

the movement off elctrons is an evacuated space 

name    invention of first generation of coomputer (lee dee foresst) in 1940 to 1956

   

the main  feature of  first generation of computer 

      1) in this generation mainly batch programming operating system  were used in this generation 

2) punched carrrdd pepar tape  magnetic tap and input output device were used 

Advantage of generation

vacumm tube technology

 unreliable

supported machine language only 

veryy costly

generat lot heat 

slow input /output devices

huge size

need of  AC

non protable consumed lot of electricity