Program testing can be used to show the presence of bugs, but never to show their absence!
- Edsger Dijkstra - [1972]Quoted in More Programming Pearls, Column 6: Bumper-Sticker Computer Science Quoted in More Programming Pearls, Column 6: Bumper-Sticker Computer Science
 
Software is written by humans and therefore has bugs.
- John Jacobs
 
Don’t fix bugs later; fix them now.
- Steve Maguire, Writing Solid Code: Microsoft's Techniques for Developing Bug-Free C Programs by Steve Maguire , ISBN: 1556155514
 
Never allow the same bug to bite you twice.
- Steve Maguire, Writing Solid Code: Microsoft's Techniques for Developing Bug-Free C Programs by Steve Maguire , ISBN: 1556155514
 
Beware of bugs in the above code; I have only proved it correct, not tried it.
- Donald E. Knuth
 
Version 1 of any software is full of bugs. Version 2 fixes all the bugs and is great. Version 3 adds all the things users ask for, but hides all the great stuff in Version 2.
- Fred Blechman
 
It's not a bug - it's an undocumented feature.
- Anonymous
 
When you spend time to find & fix all the bugs in your project, you can't complete the project in your life time.
- Anonymous - Ignore some bugs
 
Don't wait until you have a bug to step through your code.
- Steve Maguire - Chapter 4: Step Through Your Code. , Writing Solid Code: Microsoft's Techniques for Developing Bug-Free C Programs by Steve Maguire , ISBN: 1556155514
 
With good program architecture debugging is a breeze, because bugs will be where they should be.
- David May
 
If debugging is the process of removing bugs. Then programming must be the process of putting them in.
- Edsger Dijkstra
 
3 Biggest Software Lies:
- The program's fully tested and bug-free.
- We're working on the documentation.
- Of course we can modify it.

- Anonymous
 
Let he who has a bug free software cast the first stone.
- Assaad Chalhoub