- OSN Camp 2008 Open Source Ecology: Flex Fab and the Living Collaboratory
- OSN MOU
- OSN Members
- OSN Open Education
- OSN member pledge
- OSN members
- OSN members/Suggested members
- OSOTF
- OSSTIP
- OSSTIP/Loading GTFS to a GIS database
- OSSTIP/Notes on getting OpenTripPlanner Batch Analyst working
- OSSTIP/OpenTripPlanner Issues
- OSSTIP/Project blog
- OSSTIP/Setup of OpenTripPlanner to display Melbourne PT network
- OSSTIP/SimpleGTFSCreator
- OSSTIP/WP1
- OSSTIP/WP2
- OSSTIP/WP3
- OSSTIP/WP4
- OSSTIP/WP5
- OSSTIP/WP6
- OSSTIP/WPBZE1
- OSSTIP/WPBZE2
- OSSTIP/WPBZE3
- OSSTIP/WPBZE4
- OSSTIP/WPPTUA1
- OSSTIP/WPPTUA2
- OSSTIP/WPPTUA3
- OSSTIP/WPPTUA4
- OSSTIP/WP Progress Archive
- OSSTIP/visualise OD matrix in QGIS
- OSU Bike Trailer
- OSU Cooking Class
- OSU Green Roof
- OSU Hydrogen Trailer
- OSU Permaculture Group
- OSU Solar Vehicle Team
- OSU Student Sustainability Initiative
- OSU Student Sustainability Inititaive
- OS Rheometer (from MIT):FAST
- OTRC Knee Joint
- Oak
- Oakton StableTemp Economy Oven
- Oaxaca
- Oaxaca Water Quality Forum
- Object oriented OpenSCAD
- Objectified (documentary)
- Oblique Plane Deformity - Graphical method
- Oblique Plane Deformity - Graphical method/ko
- Observation of the environment by telescope
- Observational Energy Assessment
- Observational U.S. home energy assessment
- Observatorio de Género y Justicia Ambiental (PNUD Bootcamp 2023)
- Observer status (international environmental agreement negotiations)
- Obvious 3D printer technology based on 01. Segmentation
- Obvious 3D printer technology based on 02. Extraction
- Obvious 3D printer technology based on 03. Local Quality
- Obvious 3D printer technology based on 04. Asymmetry
- Obvious 3D printer technology based on 05. Combination
- Obvious 3D printer technology based on 06. Universality
- Obvious 3D printer technology based on 07. Nesting
- Obvious 3D printer technology based on 08. Counterweight
- Obvious 3D printer technology based on 09. Prior Counteraction
- Obvious 3D printer technology based on 1. Segmentation
- Obvious 3D printer technology based on 10. Prior Action
- Obvious 3D printer technology based on 11. Cushion in Advance
- Obvious 3D printer technology based on 12. Equipotentiality
- Obvious 3D printer technology based on 13. Inversion
- Obvious 3D printer technology based on 14. Spheroidality
- Obvious 3D printer technology based on 15. Dynamicity
- Obvious 3D printer technology based on 16. Partial, overdone or excessive action
- Obvious 3D printer technology based on 17. Moving to a new dimension
- Obvious 3D printer technology based on 18. Mechanical vibration
- Obvious 3D printer technology based on 19. Periodic action
- Obvious 3D printer technology based on 2. Extraction
- Obvious 3D printer technology based on 20. Continuity of useful action
- Obvious 3D printer technology based on 21. Rushing through
- Obvious 3D printer technology based on 22. Convert harm into benefit
- Obvious 3D printer technology based on 23. Feedback
- Obvious 3D printer technology based on 24. Mediator
- Obvious 3D printer technology based on 25. Self-service
- Obvious 3D printer technology based on 26. Copying
- Obvious 3D printer technology based on 27. Inexpensive short life
- Obvious 3D printer technology based on 28. Replacement of a mechanical system
- Obvious 3D printer technology based on 29. Use pneumatic or hydraulic systems
- Obvious 3D printer technology based on 3. Local Quality
- Obvious 3D printer technology based on 30. Flexible film or thin membranes
- Obvious 3D printer technology based on 31. Use of porous materials
- Obvious 3D printer technology based on 32. Changing the colour
- Obvious 3D printer technology based on 33. Homogeneity
- Obvious 3D printer technology based on 34. Rejecting and regenerating parts
- Obvious 3D printer technology based on 35. Transforming physical or chemical states
- Obvious 3D printer technology based on 36. Phase transition
- Obvious 3D printer technology based on 37. Thermal expansion
- Obvious 3D printer technology based on 38. Use strong oxidisers
- Obvious 3D printer technology based on 39. Inert environment
- Obvious 3D printer technology based on 4. Asymmetry
- Obvious 3D printer technology based on 40. Composite materials
- Obvious 3D printer technology based on 5. Combination
- Obvious 3D printer technology based on 6. Universality
- Obvious 3D printer technology based on 7. Nesting
- Obvious 3D printer technology based on 8. Counterweight
- Obvious 3D printer technology based on 9. Prior Counteraction
- Obvious 3D printing inventions that can not be patented
- Obvious 3D printing inventions that can not be patented/zh
- Occidental Greywater
- Occidental greywater
- Occidental greywater/es
- Occupy Sustainability
- Occupy farms
- Ocean Pollution - Great Pacific Garbage Patch
- Ocean acidification
- Ocean acidification/es
- Ocean acidification/it
- Ocean acidification/si
- Ocean current
- Ocean energy conversion system
- Ocean wave energy conversion system
- Oceans
- Oceans-Climate School
- Octayurt
- Octoyurt
- Ode to the Tech Fix - Chris Malins
- OdoReader
- OdoReader/de
- Odocs
- Odon Device for assisted vaginal delivery
- Odor Baited Station
- Of Arms and the Man - James Hester
- Off-grid
- Off-the-grid
- Off-the-grid/nl
- Off-the-grid/pt
- Off grid photovoltaic system on Fickle Hill
- Off the grid
- Offgassing
- Official development assistance
- Offline browsing
- Offline content
- Offline content collaboration
- Offline content creation
- Offshore Wind Farms
- Ohio
- Ohio community action
- Ohm's Law
- Oil
- Oil Extraction (Practical Action Brief)
- Oil Extraction (Practical Action Brief)/mr
- Oil Soaked Wood Bearings (Practical Action Technical Brief)
- Oil Soaked Wood Bearings (Practical Action Technical Brief)/ru
- Oil dependency
- Oilcloth
- Oils
- Ojiya-Chijimi y Echigo-jofu
- Oklahoma
- Oklahoma community action
- Okra
- Okra/mr
- Old Growth Cellar rainwater catchment
- Old Time Ads
- Old Time Various How to Do It
- Ole Ersson
- Olympia, Washington
- Olympia community action
- Omron HEM-Solar
- On Lying to Children - Hestia Peppe
- On Lying to Children - Peep
- On Watermills in Central Crete
- On becoming a conservative - Vinay Gupta
- On becoming an adult - Eleanor Saitta
- On the Drawing Board
- On the Future We Deserve… - Antonio Dias
- On the Hyphae drawing board
- On the care of soils
- Onderdonk's Box Instructions
- OneHotPotato
- One Bryant Park
- One Bryant Park/zh
- One Laptop Per Child
- One Laptop per Child
- One Pot Two Pot...Jackpot
- One Sheet Solar Cooker
- One Way Ratchet
- One Way Ratchet/es
- One big wiki
- One in Six, a Strategy for Reduction - Glenn Hall
- Ongoing Collaboratories
- Onions
- Online Open Distance Learning - Anil Prasad
- Online collaboration
- Online communities
- Online community
- Online community asset mapping
- Online courses and materials
- Online platforms for collaborative consumption
- Online volunteering
- Ontario
- Ontario Snow Resorts Association
- Ontario community action
- Open
- Open-Island
- Open-Island/de
- Open-Island book
- Open-Labware.net
- Open-Labware.net/zh
- Open-Source 3D-Printable Optics Equipment
- Open-Source 3D Printed Surgical Retractors
- Open-Source Automated Mapping Four-Point Probe
- Open-Source Centrifuges
- Open-Source Colorimeter
- Open-Source Design and Economics of Manual Variable-Tilt Angle DIY Wood-Based Solar Photovoltaic Racking System
- Open-Source Designs for Distributed Manufacturing of Low-Cost Customized Walkers
- Open-Source Flexible Materials Tensile Testing Apparatus
- Open-Source Grinding Machine for Compression Screw Manufacturing
- Open-Source Grinding Machine for Compression Screw Manufacturing/de
- Open-Source Grinding Machine for Compression Screw Manufacturing/fr
- Open-Source Grinding Machine for Compression Screw Manufacturing/ru
- Open-Source Grinding Machine for Compression Screw Manufacturing/tr
- Open-Source Grinding Machine for Compression Screw Manufacturing/vi
- Open-Source Hardware
- Open-Source Hardware May Address the Shortage in Medical Devices for Patients with Low-Income and Chronic Respiratory Diseases in Low-Resource Countries
- Open-Source Lab
- Open-Source Lab:How to Build Your Own Hardware and Reduce Research Costs
- Open-Source Laser Welder
- Open-Source Medical Hardware for Pandemics
- Open-Source Medical Hardware for Pandemics/zh
- Open-Source Microcontrollers
- Open-Source Optics
- Open-Source Photometric System for Enzymatic Nitrate Quantification
- Open-Source Photometric System for Enzymatic Nitrate Quantification/hi
- Open-Source Photometric System for Enzymatic Nitrate Quantification/zh
- Open-Source Script for Design and 3D Printing of Porous Structures for Soil Science
- Open-Source Syringe Pump Library
- Open-Source Three-Dimensional Printable Infant Clubfoot Brace
- Open-Source Three-Dimensional Printable Infant Clubfoot Brace/zh
- Open-Source Vertical Swinging Wood-Based Solar Photovoltaic Racking Systems
- Open-licensed
- Open-o-Meter
- Open-o-Meter/es
- Open-source
- Open-source, self-replicating 3-D printer factory for small-business manufacturing
- Open-source, self-replicating 3-D printer factory for small-business manufacturing/es
- Open-source, self-replicating 3-D printer factory for small-business manufacturing/fr
- Open-source-metal-3-d-printer
- Open-source 3-D Platform for Low-cost Scientific Instrument Ecosystem
- Open-source 3-D Platform for Low-cost Scientific Instrument Ecosystem/cs
- Open-source 3-D Platform for Low-cost Scientific Instrument Ecosystem/es
- Open-source 3-D Platform for Low-cost Scientific Instrument Ecosystem/fr
- Open-source 3-D Platform for Low-cost Scientific Instrument Ecosystem/th
- Open-source 3-D Platform for Low-cost Scientific Instrument Ecosystem/zh
- Open-source 3-D Printing in Managing Humanitarian Innovation
- Open-source 3-D printable autoinjector: Design, testing, and regulatory limitations
- Open-source 3-D printers
- Open-source 3-D printing Technologies for Education: Bringing Additive Manufacturing to the Classroom
- Open-source 3-D printing materials database generator
- Open-source 3-D printing materials database generator/zh
- Open-source 3-D printing of open source appropriate technology
- Open-source 3D-printable optics equipment
- Open-source 3D-printable optics equipment/fr
- Open-source 3D Printed Push-fit Pipe Coupling
- Open-source 3D metal printer
- Open-source 3D printing
- Open-source Lab
- Open-source Lab/External Publications
- Open-source Lab/fr
- Open-source Lab/pl
- Open-source Lab/pt
- Open-source Lab/ru
- Open-source Lab/vi
- Open-source Melt Flow Indexer
- Open-source PV frame design:FAST literature review
- Open-source Photovoltaic - Electrical Vehicle Carport Designs
- Open-source Wax RepRap 3-D Printer for Rapid Prototyping Paper-Based Microfluidics
- Open-source Wax RepRap 3-D Printer for Rapid Prototyping Paper-Based Microfluidics/ar
- Open-source Wax RepRap 3-D Printer for Rapid Prototyping Paper-Based Microfluidics/cs
- Open-source Wax RepRap 3-D Printer for Rapid Prototyping Paper-Based Microfluidics/fr
- Open-source Wax RepRap 3-D Printer for Rapid Prototyping Paper-Based Microfluidics/ja
- Open-source appropriate technology
- Open-source chopper wheel
- Open-source colorimeter
- Open-source colorimeter/es
- Open-source colorimeter/it
- Open-source colorimeter/pt
- Open-source colorimeter/ro
- Open-source colorimeter/tr
- Open-source colorimeter/zh
- Open-source design of medical devices
- Open-source development of solar photovoltaic technology
- Open-source environmental chamber
- Open-source environmental chamber/ko
- Open-source environmental chamber/uz
- Open-source fiber optic cable holder
- Open-source fiber optic cable holder/fr
- Open-source fiber optic cable holder/ko
- Open-source fiber optical cable holder
- Open-source hardware
- Open-source hardware for research and education
- Open-source hardware for science in Ecuador
- Open-source hardware for science in Ecuador/pt
- Open-source lab
- Open-source lab jack
- Open-source lab jack/cs
- Open-source lab jack/fr
- Open-source lab jack/it
- Open-source lab jack/ru
- Open-source lab jack/zh
- Open-source labs
- Open-source laser cutter
- Open-source laser cutter/es
- Open-source laser cutter/ru
- Open-source laser system for polymeric welding
- Open-source laser system for polymeric welding/fr
- Open-source laser system for polymeric welding/zh
- Open-source lens holder
- Open-source lens holder/fr
- Open-source metal 3-D printer
- Open-source metal 3-D printer/es
- Open-source metal 3-D printer/fa
- Open-source metal 3-D printer/fr
- Open-source metal 3-D printer/it
- Open-source metal 3-D printer/pt
- Open-source metal 3-D printer/ru
- Open-source metal 3-D printer/tr
- Open-source metal 3-D printer/zh
- Open-source metal 3d printer
- Open-source microcontrollers
- Open-source microcontrollers/es
- Open-source microcontrollers/fr
- Open-source microcontrollers/zh
- Open-source mirror mount
- Open-source mobile water quality testing platform
- Open-source mobile water quality testing platform/es
- Open-source mobile water quality testing platform/fr
- Open-source mobile water quality testing platform/pl
- Open-source mobile water quality testing platform/pt
- Open-source mobile water quality testing platform/zh
- Open-source nanotechnology: solutions to a modern intellectual property tragedy
- Open-source optical rail
- Open-source optical rail/fr
- Open-source optics base
- Open-source parametric 3-D printed slot die system for thin film semiconductor processing
- Open-source photoluminescence system
- Open-source polylactic acid production
- Open-source polylactic acid production/Research Questions
- Open-source polylactic acid production/id