Lesson 4 - Bits and Bytes pdf

July 6, 2014 Bits and BytesLesson 4,pages 40- 46

What do we have today? • Binary codes • Bits and bytes • Storage capacity of computers and storage device

What is theuse of binary code?

Binary codeBinary code – is the only language that computer can understand, which is 0 means off and 1 means on.

What is a bit?

BitBit – each 0 or 1 is called bit

What is byte?

Byte – a group of eight bitsH - 0100100

How do the letters,numbers and symbols formed?

ASCIIAmerican Standard Code for Information Interface (ASCII)– is a special code used by most computers to represent number, letters and symbols.



Where can we store the data?

Storage DeviceStorage device – it is a place where we can save data and information.

What are the different storage device?



What are thedifferent storage capacity of computers?

Kilobyte (KB)KilobyteIt is about one thousand bytes or 1,024 characters

Megabyte (MB)MegabyteIt is about one million bytes or 1,048,576 characters

Gigabyte (GB)GigabyteIt is about one billion bytes or 1,073,741,824 characters

Terabyte (TB)TerabyteIt is about 1,024 GB characters

Pentabyte (PB)PentabyteIt is about 1,024 TB characters

Exabyte (EB)ExabyteIt is about 1,024 PB characters

Zettabyte (ZB)ZettabyteIt is about 1,024 PB characters

Yottabyte (YB)YottabyteIt is about 1,024 ZB characters

Homework Compute the number of bits in: 1. 2 kilobytes ___________________ 2. 4 kilobytes ___________________ 3. 5 megabytes__________________ 4. 8 megabytes__________________ 5. 8 gigabytes___________________