Post Lab question 4.1
1. Javascript is used to enhance webpages, HTML is used to structure a web page. 
Both javascript and HTML can only be viewed within the web browser.
2. Television- the user inputs by using the remote control or pressing the keys on the T.V.
and the resulting output is a command to turn on or change the channel, volume level, etc
   CD player- the user inputs a CD into a cd player and press a button on it with the resulting output of either 
skipping tracks on the CD, playing the CD, stoping the CD, or ejecting the CD.
3. Both, the input is the text that is entered in notepad and the output is the the resulting enhancements to the webpage.
the curreny converter also has both a input and output by inputing a amount and the currency you wish to convert it to 
the result is the output which is the currency the user selected.