Hi, haby - your question as stated is vague, but let me try to give you some ideas.
As far as I know, Perl isn't used much in handsets. You'll mostly see it in backend stuff (websites, billing, etc.). Is that the angle you were looking for?
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A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James
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