# Binary revision IB Computer Science

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What is a bit?
A bit is the simplest form of binary. It has a value of either 1 or 0 the computer processes as 1=On 0=Off.
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What is a byte?
A byte is a group of 8 bits e.g. 0011000. Bytes can be translated into decimal numbers, hexadecimal, etc. An example of the use of bytes is the input of a keyboard. The computer processes the binary input from the keyboard to text on the screen.
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Define binary
Binary is a number consisting of bytes which form a sequence of on/off signals to perform certain tasks. It is the easiest and most efficient way for a computer to detect electrical signals and is the only form of code modern day processors can deal.
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Hexadecimal is a base 16 system whereas binary is base 2 and decimal is base 10. It is relatively easy to convert binary to hexadecimal and it saves space due to the smaller number of characters it uses to express things.
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What has this all got to do with the current number system?
The current number system is a base 10 system. It is relatively hard for computers to convert to binary or hexadecimal and it is useless when it comes to the processing of modern day silicon processors.
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## Other cards in this set

### Card 2

What is a byte?

#### Back

A byte is a group of 8 bits e.g. 0011000. Bytes can be translated into decimal numbers, hexadecimal, etc. An example of the use of bytes is the input of a keyboard. The computer processes the binary input from the keyboard to text on the screen.

Define binary

### Card 5

#### Front

What has this all got to do with the current number system?