The document discusses computer memory units. It describes three types of memory: internal processor memory, primary memory (RAM and ROM), and secondary memory (magnetic tapes, disks, and optical disks). Primary memory handles data, with RAM being volatile and ROM being non-volatile. Secondary memory stores output and installed software. The document also defines common units for measuring computer memory capacity, such as bytes, kilobytes, megabytes, and terabytes.

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