This document provides an overview of computer memory, including definitions, history, and different types. It defines computer memory as any physical device capable of storing information temporarily or permanently. The history of computer memory is traced back to Charles Babbage's analytical engine in 1834, which used punch cards. There are different types of memory divided based on how information is stored, including volatile memory, non-volatile memory, and virtual memory. Volatile memory only maintains data while powered, while non-volatile memory can retrieve stored information after power cycling.

1. IT TOOLS FOR BUSINESS
TOPIC: MEMORY
PRESENTED BY-
DEPARTMENT: BACHELOR OF BUSINESS
ADMINISTRATION
YEAR:1ST, SEM:1
NAME: SOUMYAJIT BANERJEE
STUDENT CODE: BWU/BBA/18/020

2. CONTEXTS
– DEFINATION OF COMPUTER MEMORY
– HISTORY
– TYPES OF MEMORY
– WHAT IS RAM
– TYPES OF RAM
– WHAT IS ROM
– TYPES OF ROM
– MEMORY DIVISION ACCORDING TO STORED INFORMATION
– VOLATILE MEMORY
– NONVOLATILE MEMORY
– VIRTUAL MEMORY

3. DEFINATION OF
COMPUTER MEMORY
– COMPUTER MEMORY IS ANY PHYSICAL DEVICE CAPABLE OF
STORING INFORMATION TEMPORARILY OR PERMANENTLY.

4. HISTORY
– IN 1834 , CHARLES BABBAGE BEGINS TO BUILD HIS
"ANALYTICAL ENGINE", A PRECURSOR TO THE COMPUTER. IT
USES READ-ONLY MEMORY IN THE FORM OF PUNCH CARDS.

6. WHAT IS RAM?
– IT IS THE PHYSICAL HARDWARE INSIDE A COMPUTER THAT
TEMPORARILY STORES DATA, SERVING AS THE COMPUTER'S
"WORKING" MEMORY.

7. TYPES OF RAM
Static random-access
memory(SRAM)
Dynamic random-access
memory(DRAM)

8. WHAT IS ROM?
– READ-ONLY MEMORY (ROM) IS A TYPE OF STORAGE MEDIUM
THAT PERMANENTLY STORES DATA ON PERSONAL
COMPUTERS (PCS) AND OTHER ELECTRONIC DEVICES.

9. TYPES OF ROM
Programmable
read-only
memory (PROM)
Easable
programmable
read-only
memory(EPROM
)
Electrically Erasable
Programmable Read-
Only
Memory(EEPROM)

10. MEMORY DIVISION ACCORDING TO
STORED INFORMATION
– VOLATILE MEMORY
– NON-VOLATILE MEMORY
– SEMI-VOLATILE MEMORY
– PROTECTED MEMORY

11. VOLATILE MEMORY
– VOLATILE MEMORY IS COMPUTER STORAGE THAT ONLY
MAINTAINS ITS DATA WHILE THE DEVICE IS POWERED.

12. NONVOLATILE
MEMORY
– NON-VOLATILE MEMORY (NVM) OR NON-VOLATILE
STORAGE IS A TYPE OF COMPUTER MEMORY THAT CAN
RETRIEVE STORED INFORMATION EVEN AFTER HAVING
BEEN POWER CYCLED.

13. PRIMARY MEMORY/
MAIN MEMORY
– PRIMARY MEMORY IS COMPUTER MEMORY THAT
A PROCESSOR OR COMPUTER ACCESSES FIRST OR
DIRECTLY.
– IT ALLOWS A PROCESSOR TO ACCESS RUNNING
EXECUTION APPLICATIONS AND SERVICES THAT
ARE TEMPORARILY STORED IN A SPECIFIC
MEMORY LOCATION.
– EXAMPLE: RAM.

14. SECONDARY MEMORY
– SECONDARY MEMORY IS COMPUTER MEMORY THAT
IS NON-VOLATILE AND PERSISTENT IN NATURE AND
IS NOT DIRECTLY ACCESSED BY A
COMPUTER/PROCESSOR.
– IT ALLOWS A USER TO STORE DATA THAT MAY BE
INSTANTLY AND EASILY RETRIEVED, TRANSPORTED
AND USED BY APPLICATIONS AND SERVICES.
– EXAMPLE: READ-ONLY MEMORY (ROM), FLASH
DRIVES, HARD DISK DRIVES (HDD), MAGNETIC
TAPES AND OTHER TYPES OF INTERNAL/EXTERNAL
STORAGE MEDIA.

15. CACHE MEMORY
– is high-speed static random access memory (SRAM) that a
computer microprocessor can access more quickly than it
can access regular random access memory (RAM).
– EXAMPLE: The Intel 80486 microprocessor

16. VIRTUAL MEMORY
– IN COMPUTING VIRTUAL MEMORY IS A MEMORY
MANAGEMENT TECHNIQUE THAT PROVIDES AN "IDEALIZED
ABSTRACTION OF THE STORAGE RESOURCES. THAT ARE
ACTUALLYAVAILABLE ON A GIVEN MACHINE“ WHICH
"CREATES THE ILLUSION TO USERS OF A VERY LARGE (MAIN)
MEMORY

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