What is PROM

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WHAT IS PROM (PROGRAMMABLE READ ONLY MEMORY) 

Programmable  read  only  memory   is  a  variation  of  ROM  i.e  read  only  memory  or  we  can  say  extended  form  of  ROM . PROMS  are  programmed  to  record  information  using  a  special  facility  known  as  PROM  - PROGRAMMER . ROM  chips  are  supplied  by  the  computer manufacturer  and  it  is  not  possible  for  a  customers  to  modify  the  program  stored  inside  the  ROM chips . However , it is possible  for the user to customise the system by converting his own programs  to  micro  programs  and  storing  them  in  PROM  chip . PROM is  one  in  which  data  is  burned  by  manufacturer . We  can  say  the  facility  which  is  not  possible in ROM   to  write  any  information  is  possible  in  PROM . But  we  can  only  write and  read  the  information  in  PROM  we  cannot  erase  the  information  in  PROM .

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