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** Bits and Bytes **

Data i s in for m a ti o n that h as n o m ea nin g. If someone wa l ks up to you and g i ves you a p i ece of paper w ith ' 1 2 0987 wr itt e n o n it, the number could mean abso l ut e l y an y thin g. It cou ld be their birthday, or h ow much money you ow e them. Da ta only becomes in for m at i o n w h e n you k n ow t h e co nt ex t of t h e d a ta.
 * //__Dat __//****//__a __//**//__h __////__as **No Meaning** __//

1) Computers are machines that process data . They're stupid - they don't understand the data they process. 2 ) If you get a computer to process data that's incorrect, the results will be meaningles s. // E.g ////. // I f // yo //// u p //// rogra //// m // a // com //// put //// e //// r t //// o wo //// r //// k o //// u //// t t //// h //// e tota //// l //// cost // of // b //// u //// y //// i //// ng f //// i //// fty p //// i //// zzas //// at // // £2.99 //// eac //// h ////, //// b //// ut //// yo //// u t //// ype //// in // £29. 9 // by //// mi //// stake ////, //// yo //// u //// ' //// ll //// ge //// t //// t //// h //// e //// wro //// n //// g a //// n //// swe //// r ////. // This is called Garbage In, Garbage Out ( GIGO ).

3 ) Some peop l e call this 'computer error ' . They ' re wrong - it's human error . Computers hardly ever make mistakes. They j ust do what they ' re programmed to do .  Comp ut e r s run o n e l ect ri c it y - try u si n g a com puter w ithout it. T h ey co n s i s t of a numb e r of e l ec tri c ci r c u i t s, a nd eac h c ir cui t ca n be in one of on l y two s tates - ** o **** n ** o r ** off **.
 * //__ Data __//**//__ i __////__ s stor __////__ e __////__ d __////__ i __////__ n __//**//__ Bytes __//**

1) Co mput ers use a binary code (i.e. they use only 2 digits) to represent data. Usually a circuit that's sw it ched on represents the digit 1, a nd on e th a t' s sw it c h ed off represents the digit // 0 //// . // // ( //// Morse code works //// ill // a // s //// imil //// a //// r //// way // - // i //// t's either // a // dot or // a // dash //// .) //     [[image:http://lucas-l.wikispaces.com/site/embedthumbnail/placeholder?w=339&h=50 width="339" height="50" caption="Text Box: A binary number is either a 0 or a 1 and is known as a 'bit' or  b inary dig it.

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2) C hara cters ca n be represented by an 8 · bit (i.e. 1 b yte ) ASCII code (pronounced ASSKEY).

For exa mple a l etter or number co uld be r e pr esen t ed by 01000100. (=1 byte) The word **Hazel** would take 5 bytes of memory to store.


 * ** File ** ||  ** File size **  ||
 * Photo ||  3MB   ||
 * Song ||  5MB   ||
 * Film ||  700MB   ||

A file’s size can be influenced by a number of factors but ultimately the more information a file stores, the larger it will be.

More information on Bits and Bytes: []
 * __Questions__**

Multiple gigabytes or terabytes but in special cases, Petabytes 4 bytes of memory terabyte 341.33 1498 196 Complete this quiz (let your teacher know your score) []
 * 1) What are the usual capacities of other storage mediums?
 * 1) How much memory is used by the word Gary?
 * 1) What comes after gigabyte?
 * 1) If a memory card stores 1GB… how many photos (based on the photos being 3mb) can you store on it?
 * 1) A hard drive stores 1TB how many movies can you fit on it? (based on 700mb per movie)
 * 1) Avatar the movie on blueray is 10.43GB in size how many movies of this size could you fit on a 2 TB drive?