"Biology is the most powerful technology ever created. DNA is software, protein are hardware, cells are factories". 
Arvind Gupta

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"Software Engineering might be science; but that's not what I do. I'm a hacker, not an engineer."
 Jamie Zawinski

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"Software is a great combination between artistry and engineering." 
Bill Gates

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"Software is like sex: it's better when it's free."
Linus Torvalds

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"It's hardware that makes a machine fast. It's software that makes a fast machine slow." 
Craig Bruce

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"Software comes from heaven when you have good hardware." 
Ken Olsen

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"Be careful about virtual relationships with artificially intelligent pieces of software." 
Larry Ellison