- On signal is represented by 1
- Off signal is represented by 0
- Decimal-ordinary numbers become 1's and 0's when converted to binary.
- They consist of #'s 0-9 and to continue on you must ass a second column of digits 10,11,12....
- Binary uses two digits, so each column is worth twice the one before.
- Each number then is looked at as a component oef its positional values(each a power of 2)
- Binary denotes all numbers with combinations of 2 digits.
- Decimal numbers are automatically converted into binary numbers and vice versa.
- Binary number processing is completely hidden from the user.
2 10
3 11
4 100
5 101
6 110
7 111
8 1000
9 1001
10 1010
11 1100
12 1101
14 1110
15 1111
Bits and Codes
- ASCII
- The most widely used code.
- An abbreviation of American Standard Code for Information Interchange
- Unicode.
- A coding scheme that supports 65,000 unique characters.
Bits as Instructions in Programs
- Program instructions are represented in binary notation, through the use of codes.
Bits, Bytes, and Buzzwords
- Bit-related terminology
- Kilobytes(KB)= 1 thousand bytes
- Megabytes(MB)=1 million bytes
- Gigabytes(GB)=1 Billion bytes
- Terabytes(TB)=1 Trillion bytes
Green Computing
- The manufacture of hardware and software can have an impact on the environment.
- Buy green equipment(Energy Star)
- Use a notebook and a solar battery
- Use energy -saving features
- Turn off computer when our away
- Screen savers don't save anything
- Recycle waste products
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