Computer Momory

 WHAT IS COMPUTER MEMORY

DEFINITION

The work that we do on the computer where all the work is stored is called Memory.

TYPES OF COMPUTER MEMORY

1)      PRIMARY MEMORY

2)      SECONDARY MEMORY

3)      CACHE MEMORY

 

1)      PRIMARY MEMORY

A)     RAM ( RANDOM ACCESS MEMORY)

B)      ROM  ( READ ONLY MEMORY)

 

A)   RAM

i)                   STATIC RAM

ii)                DYNAMIC RAM

B)    ROM

I)                    PROM (PROGRAMABLE ROM)

II)                  EPROM ( ERASABLE PROGRAMABLE ROM)

III)                EEPROM  (ELECTRICALLY ERASABLE PROGRAMABLE ROM)

FEW DIFFERENCES BETWEEN PRIMARY AND SECONDARY MEMORY

1. PRIMARY MEMORY IS BASED ON IC

1. SECONDARY MEMORY IS BASED ON MAGNETIC PAPER

2. PRIMARY MEMORY IS FAST

2. SECONDARY MEMORY IS LITTLE SLOW 

3. PRIMARY MEMORY IS EXPENSIVE 

3. SECONDARY MEMORY IS CHEAP

4. PRIMARY MEMORY CAN STORE FEW DATA

4. SECONDARY MEMORY CAN STORE LOTS OF DATA

5. PRIMARY MEMORY STORED DATA TEMPORARILY. 

5. SECONDARY MEMORY STORED DATA PERMANENTLY.