Page 10 - Trackpad_V1_Book 4_Flipbook
P. 10
COMPUTER MEMORY
You know that the 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; millilitre 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 Brontobytes 1 Geopbyte
PURE
A group of 4 bits is called a nibble, i.e., 1 byte = 8 bits FACT
8 Trackpad (Version 1.0)-IV

