Motivation: Parsing
lParsing is the act of turning text into meaningful information.
lExample:
lProgramming language: Parsing makes the language into an executable machine language program.
l
lCalculator: Parsing interprets the symbols to carry out the calculation being represented.
 345 + 62.7*84.9
doesnŐt have a ŇmagicalÓ meaning; we have to give it one.