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MEASURING THE COMPUTER’S MEMORY
The basic unit for measuring the memory of a computer is byte. A byte consists of
a group of eight bits, for example, 10001011, i.e., 1 byte equals to 8 bits. A group
of 4 bits is known as a nibble (half byte), for example, 1001, i.e., 1 nibble equals to
4 bits.
Other units for measuring the computer’s memory are kilobyte, megabyte, gigabyte,
terabyte, and so on.
✶ 1 Kilobyte (KB) equals 1024 bytes.
1 KB = 1024 B
✶ 1 Megabyte (MB) equals 1024 KB.
1 MB = 1024 KB
✶ 1 Gigabyte (GB) equals 1024 MB.
1 GB = 1024 MB
✶ 1 Terabyte (TB) equals 1024 GB. 1 TB = 1024 GB
✶ 1 Petabyte (PB) equals 1024 TB. 1 PB = 1024 TB
1 EB = 1024 PB
✶ 1 Exabyte (EB) equals 1024 PB.
1 ZB = 1024 EB
✶ 1 Zettabyte (ZB) equals 1024 EB.
1 YB = 1024 ZB
✶ 1 Yottabyte (YB) equals 1024 ZB.
Restart
Along with the hardware, the computer requires software to work.
A computer accepts data and instructions through input devices.
Processing is done on the data entered into the computer, to convert it into
meaningful information.
The output devices are used to display the information and result of
computation.
The storage devices are used to store data and information for future use.
Magnetic disk is covered with magnetic coating.
An optical disk is an electronic data storage medium that can be written to
and read using a low powered laser beam.
The USB Flash Drive is a small portable data storage device integrated with
a USB (Universal Serial BUS) connector.
The CD drive reads information stored on a compact disc (CD).
The basic unit for measuring the memory of a computer is byte.
Other units for measuring the computer’s memory are kilobyte, megabyte,
gigabyte, terabyte, and so on.
Fundamentals of a Computer 17

