Findings:
- How an operating system boots
- International Union of Operating Engineers
- batch operating system
- Internetwork Operating System
- standing but not operating
- The man behind the operating system
- X-OS: eXtreme operating system
- Net Operating Loss
- Operating Instructions
- real-time operating system
- Modern Operating Systems
- Windows 95 Operating System Components
- They forgot to give me the operating system!
- "operating system" loophole in the GNU GPL
- Self-updating operating system
- Operating Systems Design and Implementation
- Unix-like operating systems
- Toy operating systems
- Standard Operating Procedure
- operating profit
- The perfect operating system
- Pink operating system
- Regional Bell Operating Company
- Bell Operating Company
- operating ratio
- Operating Missions as Nodes on the Internet: IP in Space
- The Operating Theater
- Operating Systems (e2poll)
- Operating Room drama
- Operating Manual for Spaceship Earth
- Windows (operating system)
- The Oldest Established
- World's oldest joke
- Symbolism is the oldest language of mankind
- This is the oldest I've ever been
- The all night vigil, the oldest of human traditions
- The Oldest Baby In The World
- When you're the oldest, you're not allowed to feel pain
- The oldest trick in the book
- Water is the oldest medicine.
- God ignores His oldest children and forgets the quietest
- Views from the Oldest House
- oldest Earth rock
- Oldest Living Confederate Widow Tells All
- Answer: The oldest chestnut
- Old chestnut: The oldest chestnut
- The oldest and largest living thing
- Continually
- World's oldest profession
- Operating system
- Domain Operating System
- Disk Operating System
- fringe operating systems
- Linux-based operating system
- Be Operating System
- M&M's standard operating procedure for bored engineers
- real operating system
- Train Operating Company
- Guardian Operating System
- Radar operating modes
- actual operating system locales
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