Page 10 - Trackpad v5 class 4
P. 10
COMPUTER MEMORY
You know that computer takes input as data and instructions and gives output as
information. The entered input (data and instructions) and received output (information)
are stored inside a memory which is called computer memory. The data stored in the
computer can be stored for a long time and can be retrieved from the computer’s memory,
as and when required.
HOW IS MEMORY MEASURED IN A COMPUTER?
We use different units of measurement to measure something, such as gram and kilogram
for measuring weight; metre and kilometre for distance; mililitre and kilolitre for liquid.
Similarly, the measurement unit or storage unit in which the computer stores information
is called memory unit. The basic unit for measuring the memory of a computer is the byte.
Byte: A combination of eight bits makes up a byte. For example, 10001011, i.e., 1 byte
equals 8 bits.
Bit: Data and information on a computer is stored in the form of 0s and 1s . These are
called binary digits or bits. A group of 4 bits is known as a nibble (half byte).
The following are the various units of computer memory measurements:
8 bits 1 byte 1024 bytes 1 Kilobyte (KB)
1024 Megabytes 1 Gigabyte (GB) 1024 Kilobytes 1 Megabyte (MB)
1024 Gigabytes 1 Terabyte (TB) 1024 Terabytes 1 Petabyte (PB)
1024 Exabytes 1 Zettabyte (ZB) 1024 Petabytes 1 Exabyte (EB)
1024 Zettabytes 1 Yottabyte (YB) 1024 Yottabytes 1 Brontobyte
1024 Brontobyte 1 Geopbyte
PURE
A group of 4 bits is called a nibble, i.e., 1 byte = 8 bits FACT
8 Pro (Ver. 5.0)-IV

