memory unit

1. PRESENTATION ON COMPUTER MEMORY UNIT

2. Memory unit stores data and information

3. TYPES OF MEMORY Internal processor Primary (main) memory Secondary memory

4. Internal memory : Used to compensate for the speed gap between the primary memory and processor.

5. Primary Memory : Is used to handle data. RAM (Random Access Memory) and ROM (Read Only Memory) fall in this category. The former is volatile while the latter is non-volatile.

6. Secondary Memory : Used to store the out put (and even out put to programs) and of course the tons of software that are installed in a computer. Magnetic tapes, magnetic disk and the new age optical disk fall in this category

7. UNITS FOR MEASURING COMPUTER UNIT nybble, nibble — a small byte byte — a sequence of 8 bits (enough to represent one character of alphanumeric data) processed as a single unit of information sector — the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes block — (computer science) a sector or group of sectors that function as the smallest data unit permitted allocation unit — a group of sectors on a magnetic disk that can be reserved for the use of a particular file partition — (computer science) the part of a hard disk that is dedicated to a particular operating system or application and accessed as a single unit word — a word is a string of bits stored in computer memory kilobyte, K, KB — a unit of information equal to 1024 bytes megabyte, MB — a unit of information equal to one million (1,048,576) bytes gigabyte, GB — a unit of information equal to one billion (1,000,000,000) bytes or one thousand megabytes terabyte, TB — a unit of information equal to one trillion (1,000,000,000,000) bytes